diff --git a/03-javascript-core/13-array-high-order-methods/starter.js b/03-javascript-core/13-array-high-order-methods/starter.js
index 7a5b5b5..c62dd9a 100644
--- a/03-javascript-core/13-array-high-order-methods/starter.js
+++ b/03-javascript-core/13-array-high-order-methods/starter.js
@@ -5,6 +5,20 @@ const students = [
   { name: "小陈", finished: false },
 ];
 
+const scores1 = scores.map(item => item = item + '分')
+const scores2 = scores.filter(item => item > 60)
+const scores3 = scores.reduce((acc, item) => { return item + acc }, 0)
+const scores4 = scores.find(item => item >= 90)
+const scores5 = scores.some(item => item >= 90)
+const scores6 = students.every(item => item.finished === true)
+
+console.log("分数：" + scores1);
+console.log("及格分：" + scores2);
+console.log("总分：" + scores3);
+console.log("第一个 >= 90 的分数：" + scores4);
+console.log("是否存在不及格：" + scores5);
+console.log("是否都及格：" + scores6);
+
 // 任务：
 // 1. 用 map 生成 ["58分", ...]
 // 2. 用 filter 筛出及格分
@@ -12,3 +26,9 @@ const students = [
 // 4. 用 find 找到第一个 >= 90 的分数
 // 5. 用 some 判断是否存在不及格
 // 6. 用 every 判断 students 是否都 finished 为 true
+/* 用 `map` 生成带单位的新数组
+- 用 `filter` 找出及格成绩
+- 用 `reduce` 计算总分
+- 用 `find` 找出第一条大于等于 90 的成绩
+- 用 `some` 判断是否有人不及格
+- 用 `every` 判断是否全部完成考试*/
\ No newline at end of file
diff --git a/03-javascript-core/14-memory-and-execution/starter.js b/03-javascript-core/14-memory-and-execution/starter.js
index 61f9307..5d41df8 100644
--- a/03-javascript-core/14-memory-and-execution/starter.js
+++ b/03-javascript-core/14-memory-and-execution/starter.js
@@ -19,7 +19,16 @@ function printStepTwo() {
 function updateUser(user) {
   // 任务：
   // 1. 修改 user.city
+  user.city = '北京'
 }
+scoreB = 90
+console.log('scoreA' + scoreA + ',scoreB' + scoreB);
+userB.city = '秦皇岛'
+console.log(userA.city, userB.city);
+printStepOne()
+printStepTwo()
+updateUser(userA)
+console.log(userA);
 
 // 任务：
 // 2. 修改 scoreB，观察 scoreA 是否变化
diff --git a/03-javascript-core/15-switch-break-and-empty-values/starter.js b/03-javascript-core/15-switch-break-and-empty-values/starter.js
index 700f143..2dd6d64 100644
--- a/03-javascript-core/15-switch-break-and-empty-values/starter.js
+++ b/03-javascript-core/15-switch-break-and-empty-values/starter.js
@@ -6,9 +6,43 @@ const finalComment = null;
 let statusText = "";
 const finishedRecords = [];
 
+switch (learningStatus) {
+  case 'review':
+    console.log('已学习')
+    break
+  case 'ing':
+    console.log('学习中');
+    break
+  case 'prepare':
+    console.log('未学习');
+    break
+  default:
+    console.log('状态未知');
+    break
+}
+
+console.log(optionalNote, finalComment);
+
+for (let i = 0; i < records.length; i++) {
+  if (records[i] === null || records[i] === undefined) {
+    console.log(`第${i + 1}项为空值，停止读取`)
+    break
+  } else {
+    finishedRecords.push(records[i])
+  }
+}
+
+console.log(finishedRecords)
+
+
 // 任务：
 // 1. 用 switch 给 learningStatus 生成说明文字
 // 2. 输出 optionalNote 和 finalComment 分别是什么
 // 3. 用 for 循环读取 records
 // 4. 如果遇到 undefined 或 null，就 break
 // 5. 输出 finishedRecords
+/*用 `switch` 根据学习状态输出不同说明
+- 观察 `undefined` 和 `null` 的区别
+- 用循环读取学习记录
+- 如果读到 `undefined` 或 `null`，立即用 `break` 停止循环
+- 输出停止前已经读取到的内容*/
\ No newline at end of file
diff --git a/03-javascript-core/16-final-review/starter.js b/03-javascript-core/16-final-review/starter.js
index 28dae11..193c97d 100644
--- a/03-javascript-core/16-final-review/starter.js
+++ b/03-javascript-core/16-final-review/starter.js
@@ -2,6 +2,7 @@ const reviewer = {
   name: "林晨",
   stage: "final-review",
   showTitle() {
+    console.log(`学习营总复盘器`);
     // 输出总复盘标题
   },
 };
@@ -14,12 +15,47 @@ const lessons = [
   { title: "综合回顾", score: 95, finished: true },
 ];
 
-let mentorNote;
-const reviewComment = null;
+let mentorNote;//undefined
+const reviewComment = null;//null
 
 function getStageText(stage) {
   // 用 switch 返回阶段说明
+  switch (stage) {
+    case 'final-review':
+      console.log('已学习');
+      break
+    case 'ing-review':
+      console.log('学习中');
+      break
+    case 'start-review':
+      console.log('未学习');
+      break
+    default:
+      console.log('状态未知');
+      break
+  }
 }
+reviewer.showTitle()
+
+console.log(mentorNote, reviewComment);
+
+const lessons1 = []
+for (let i = 0; i < lessons.length; i++) {
+  if (lessons[i].score != null) {
+    lessons1.push(lessons[i])
+  }
+}
+
+const sum = lessons.reduce((acc, item) => {
+  return acc + item.score
+}, 0)
+console.log("总分：" + sum);
+console.log(`平均分：${sum / lessons.length}`);
+
+
+const reviewerAlias = reviewer
+reviewerAlias.stage = 'ing-review'
+console.log(reviewer.stage, reviewerAlias.stage);
 
 // 任务：
 // 1. 调用 reviewer.showTitle()
@@ -28,3 +64,11 @@ function getStageText(stage) {
 // 4. 用高阶函数统计课程标题、完成状态和平均分
 // 5. 创建 reviewerAlias 指向 reviewer，修改 stage，观察原对象是否变化
 // 6. 输出最终结果
+/* 一个带方法的 `reviewer` 对象
+- 一个 `lessons` 数组
+- 一个用 `switch` 输出阶段说明的函数
+- 一个用 `for + break` 清洗有效数据的过程
+- 至少两个数组高阶函数
+- 对 `undefined` 和 `null` 的判断
+- 一段对象引用变化的观察代码
+- 最终输出标题、有效课程、平均分、完成状态*/
diff --git a/04-dom-events-async/01-query-selectors/starter.html b/04-dom-events-async/01-query-selectors/starter.html
index b1eda62..feaaba0 100644
--- a/04-dom-events-async/01-query-selectors/starter.html
+++ b/04-dom-events-async/01-query-selectors/starter.html
@@ -1,52 +1,59 @@
 <!DOCTYPE html>
 <html lang="zh-CN">
-  <head>
-    <meta charset="UTF-8" />
-    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
-    <title>获取元素</title>
-    <style>
-      body {
-        margin: 0;
-        padding: 32px;
-        font-family: "PingFang SC", "Microsoft YaHei", sans-serif;
-        background: #f6f8fb;
-      }
 
-      .panel {
-        max-width: 760px;
-        margin: 0 auto;
-        padding: 24px;
-        border-radius: 20px;
-        background: #ffffff;
-        border: 1px solid #dbe3f0;
-      }
+<head>
+  <meta charset="UTF-8" />
+  <meta name="viewport" content="width=device-width, initial-scale=1.0" />
+  <title>获取元素</title>
+  <style>
+    body {
+      margin: 0;
+      padding: 32px;
+      font-family: "PingFang SC", "Microsoft YaHei", sans-serif;
+      background: #f6f8fb;
+    }
 
-      .cards {
-        display: grid;
-        gap: 12px;
-        margin-top: 18px;
-      }
+    .panel {
+      max-width: 760px;
+      margin: 0 auto;
+      padding: 24px;
+      border-radius: 20px;
+      background: #ffffff;
+      border: 1px solid #dbe3f0;
+    }
 
-      .card {
-        padding: 16px;
-        border-radius: 14px;
-        background: #f8fbff;
-        border: 1px solid #dce8f8;
-      }
-    </style>
-  </head>
-  <body>
-    <section class="panel">
-      <h1 id="page-title">DOM 获取元素练习</h1>
-      <button class="start-btn" type="button">开始学习</button>
+    .cards {
+      display: grid;
+      gap: 12px;
+      margin-top: 18px;
+    }
 
-      <div class="cards">
-        <article class="card">获取标题</article>
-        <article class="card">获取按钮</article>
-        <article class="card">获取一组卡片</article>
-      </div>
-    </section>
+    .card {
+      padding: 16px;
+      border-radius: 14px;
+      background: #f8fbff;
+      border: 1px solid #dce8f8;
+    }
+  </style>
+</head>
 
-    <script src="./starter.js"></script>
-  </body>
-</html>
+<body>
+  <section class="panel">
+    <h1 id="page-title">
+      <p>111</p> 获取元素练习
+    </h1>
+    <button class="start-btn" type="button">开始学习</button>
+
+    <div class="cards">
+      <article class="card">获取标题</article>
+      <article class="card">获取按钮</article>
+      <article class="card">获取一组卡片</article>
+    </div>
+  </section>
+
+  <script src="./starter.js"></script>
+
+
+</body>
+
+</html>
\ No newline at end of file
diff --git a/04-dom-events-async/01-query-selectors/starter.js b/04-dom-events-async/01-query-selectors/starter.js
index 44e5864..cdb9269 100644
--- a/04-dom-events-async/01-query-selectors/starter.js
+++ b/04-dom-events-async/01-query-selectors/starter.js
@@ -3,3 +3,11 @@
 // 2. 用 querySelector 获取按钮
 // 3. 用 querySelectorAll 获取全部卡片
 // 4. 在控制台输出标题文字、按钮文字和卡片数量
+const a = document.getElementById("page-title")
+console.log(a.textContent);
+const b = document.querySelector(".start-btn")
+console.log(b.textContent);
+const c = document.querySelectorAll(".card")
+console.log(c.length);
+
+
diff --git a/04-dom-events-async/02-text-class-style/starter.js b/04-dom-events-async/02-text-class-style/starter.js
index 2966eeb..4297513 100644
--- a/04-dom-events-async/02-text-class-style/starter.js
+++ b/04-dom-events-async/02-text-class-style/starter.js
@@ -3,3 +3,9 @@
 // 2. 修改标题文字
 // 3. 给标签加上 done 类名
 // 4. 修改描述文字颜色
+const a = document.getElementById("title")
+const b = document.getElementById("description")
+const c = document.getElementById("badge")
+a.textContent = "学习状态非常好"
+a.classList.add("badge.done")
+b.style.color = "red"
\ No newline at end of file
diff --git a/04-dom-events-async/03-create-and-remove/starter.js b/04-dom-events-async/03-create-and-remove/starter.js
index d5abcb4..f631ac2 100644
--- a/04-dom-events-async/03-create-and-remove/starter.js
+++ b/04-dom-events-async/03-create-and-remove/starter.js
@@ -1,4 +1,22 @@
 // 任务：
 // 1. 获取新增按钮、删除按钮和列表
 // 2. 点击新增按钮时创建一个新的 li 并追加到列表
+
+
+
+
 // 3. 点击删除按钮时删除最后一个 li
+const add = document.getElementById("add-btn")
+const remove = document.getElementById("remove-btn")
+const list = document.getElementById("task-list")
+add.onclick = function () {
+  const a = document.createElement("li")
+  a.textContent = "巧克力"
+  list.appendChild(a)
+}
+remove.onclick = function () {
+  const c = list.lastElementChild
+  if (c) {
+    c.remove()
+  }
+}
\ No newline at end of file
diff --git a/04-dom-events-async/04-click-counter/starter.js b/04-dom-events-async/04-click-counter/starter.js
index 6a57a2b..f4a2694 100644
--- a/04-dom-events-async/04-click-counter/starter.js
+++ b/04-dom-events-async/04-click-counter/starter.js
@@ -4,3 +4,26 @@ let count = 0;
 // 1. 获取数字元素和 3 个按钮
 // 2. 点击按钮时更新 count
 // 3. 每次修改后，把最新 count 渲染到页面
+const num = document.getElementById("value")
+const del = document.getElementById("decrease-btn")
+const add = document.getElementById("increase-btn")
+const reset = document.getElementById("reset-btn")
+
+function ren() {
+  num.textContent = count
+}
+
+add.addEventListener("click", function () {
+  count++
+  ren()
+})
+
+del.addEventListener("click", function () {
+  count--
+  ren()
+})
+
+reset.addEventListener("click", function () {
+  count = 0
+  ren()
+})
\ No newline at end of file
diff --git a/04-dom-events-async/05-form-submit-and-prevent-default/starter.js b/04-dom-events-async/05-form-submit-and-prevent-default/starter.js
index 1e1d825..b3f9572 100644
--- a/04-dom-events-async/05-form-submit-and-prevent-default/starter.js
+++ b/04-dom-events-async/05-form-submit-and-prevent-default/starter.js
@@ -4,3 +4,17 @@
 // 3. 用 preventDefault() 阻止默认提交
 // 4. 读取输入框内容，创建新 li，追加到列表
 // 5. 清空输入框
+const form = document.getElementById("todo-form")
+const input = document.getElementById("todo-input")
+const list = document.getElementById("todo-list")
+
+form.addEventListener("submit", function (e) {
+  e.preventDefault()
+  const text = input.value.trim()
+  if (text) {
+    const li = document.createElement("li")
+    li.textContent = text
+    list.appendChild(li)
+    input.value = ""
+  }
+})
\ No newline at end of file
diff --git a/04-dom-events-async/06-bubbling-and-delegation/starter.js b/04-dom-events-async/06-bubbling-and-delegation/starter.js
index fcdadae..213cb44 100644
--- a/04-dom-events-async/06-bubbling-and-delegation/starter.js
+++ b/04-dom-events-async/06-bubbling-and-delegation/starter.js
@@ -3,3 +3,28 @@
 // 2. 给 lesson-list 绑定点击事件，使用事件委托
 // 3. 点击 li 时切换 active 类名
 // 4. 点击删除按钮时，阻止冒泡并删除当前 li
+const panel = document.getElementById("panel")
+panel.addEventListener("click", function () {
+  console.log("点击外部")
+})
+
+const list = document.getElementById("lesson-list")
+list.addEventListener("click", function (event) {
+
+  const remove = event.target.closest(".remove-btn")
+  if (remove) {
+    const li = remove.closest(".lesson-item")
+
+    if (li) {
+      li.remove()
+      event.stopPropagation()
+    }
+    return
+  }
+
+  const tog = event.target.closest(".lesson-item")
+  if (tog) {
+    tog.classList.add("active")
+  }
+
+})
\ No newline at end of file
diff --git a/04-dom-events-async/07-timers-and-async-order/starter.js b/04-dom-events-async/07-timers-and-async-order/starter.js
index 4a10696..552f1ac 100644
--- a/04-dom-events-async/07-timers-and-async-order/starter.js
+++ b/04-dom-events-async/07-timers-and-async-order/starter.js
@@ -3,4 +3,24 @@
 // 2. 点击按钮后清空旧日志
 // 3. 先追加“开始执行”
 // 4. 用 setTimeout 延迟追加“异步回调完成”
+
+
+
 // 5. 再立刻追加“同步代码结束”
+const btn = document.getElementById("run-btn")
+const list = document.getElementById("log-list")
+
+function add1(message) {
+  const li = document.createElement("li")
+  li.textContent = message
+  list.appendChild(li)
+}
+
+btn.addEventListener("click", function () {
+  list.textContent = ""
+  add1("开始执行")
+  setTimeout(function () {
+    add1("异步回调完成")
+  }, 2000)
+  add1("同步代码结束")
+})
\ No newline at end of file
diff --git a/04-dom-events-async/08-promise-and-render/starter.js b/04-dom-events-async/08-promise-and-render/starter.js
index 9a0df22..e4448d7 100644
--- a/04-dom-events-async/08-promise-and-render/starter.js
+++ b/04-dom-events-async/08-promise-and-render/starter.js
@@ -12,3 +12,23 @@ function fakeFetchCourses() {
 // 3. 调用 fakeFetchCourses()
 // 4. 用 then 渲染课程列表
 // 5. 用 catch 处理错误
+const btn = document.getElementById("load-btn")
+const text = document.getElementById("status-text")
+const list = document.getElementById("course-list")
+
+btn.addEventListener("click", function () {
+  text.textContent = "加载中..."
+
+  fakeFetchCourses()
+    .then(function (result) {
+      text.textContent = "加载成功"
+      const a = result.forEach(item => {
+        const li = document.createElement("li")
+        li.textContent = item
+        list.appendChild(li)
+      });
+    })
+    .catch(function (error) {
+      list.textContent = "失败" + error
+    })
+})
\ No newline at end of file
diff --git a/04-dom-events-async/09-async-await-panel/starter.js b/04-dom-events-async/09-async-await-panel/starter.js
index 26538b6..058cbc1 100644
--- a/04-dom-events-async/09-async-await-panel/starter.js
+++ b/04-dom-events-async/09-async-await-panel/starter.js
@@ -16,3 +16,24 @@ function fakeFetchUser() {
 // 3. 用 await 等待 fakeFetchUser()
 // 4. 渲染用户信息
 // 5. 用 try...catch 处理异常
+const btn = document.getElementById("load-user-btn")
+const status = document.getElementById("user-status")
+const card = document.getElementById("user-card")
+
+async function a() {
+  status.textContent = "加载中"
+  card.innerHTML = ""
+
+  try {
+    const a = await fakeFetchUser()
+    status.textContent = "加载成功"
+    card.innerHTML = `
+    <p>姓名：${a.name}</p>
+    <p>角色：${a.role}</p>
+    <p>任务：${a.focus}</p>
+    `
+  } catch (error) {
+    status.textContent = "加载失败"
+  }
+}
+btn.addEventListener("click", a)
\ No newline at end of file
diff --git a/04-dom-events-async/10-final-dashboard/starter.js b/04-dom-events-async/10-final-dashboard/starter.js
index b0cdcfc..cb1bbb4 100644
--- a/04-dom-events-async/10-final-dashboard/starter.js
+++ b/04-dom-events-async/10-final-dashboard/starter.js
@@ -20,3 +20,85 @@ function fakeLoadExtraLessons() {
 // 3. 点击列表项时切换 done 状态
 // 4. 提交表单时阻止默认提交，并新增课程
 // 5. 点击加载按钮时显示加载状态，并把异步返回的课程追加到列表
+/* 一个课程列表区域
+- 一个表单区域
+- 一个添加课程的交互
+- 一个点击课程切换完成状态的交互
+- 一个异步加载提示或远程数据模拟
+- 清晰的状态文案更新*/
+const page = document.querySelector(".page")
+const hero = document.querySelector("hero")
+const text = document.getElementById("status-text")
+const panel = document.querySelector(".panel")
+const btn = document.getElementById("load-btn")
+const list = document.getElementById("lesson-list")
+const formPanel = document.querySelector(".form-panel")
+const lessonForm = document.getElementById("lesson-form")
+const lessonInput = document.getElementById("lesson-input")
+
+function renderLessons() {
+  lessons.forEach(item => {
+    const li = document.createElement("li")
+    li.classList.add("li")
+    li.setAttribute("title", item.title)
+    li.setAttribute("done", item.done)
+    li.textContent = `
+    标题：${item.title}
+    状态：${item.done}`
+
+    list.appendChild(li)
+  })
+}
+renderLessons()
+
+//event.target,closest,
+list.addEventListener("click", function (event) {
+  const a = event.target.closest(".li")
+  if (a) {
+    a.textContent = `
+    标题：${a.title}
+    状态：${!a.done}`
+
+    a.done = !a.done
+  }
+})
+
+lessonForm.addEventListener("submit", function (event) {
+  event.preventDefault()
+  const c = document.createElement("li")
+  const d = lessonInput.value.trim()
+  c.textContent = `
+  标题：${d}
+  状态：true`
+  c.setAttribute("title", d)
+  c.setAttribute("done", true)
+  c.classList.add("li")
+  lessonInput.value = ""
+  list.appendChild(c)
+})
+
+async function load() {
+  text.textContent = "加载中"
+  text.innerHTML = ""
+  try {
+
+    const s = await fakeLoadExtraLessons()
+    text.textContent = "加载完成"
+    s.forEach(item => {
+      const li = document.createElement("li")
+      li.classList.add("li")
+      li.setAttribute("title", item.title)
+      li.setAttribute("done", item.done)
+      li.textContent = `
+    标题：${item.title}
+    状态：${item.done}`
+
+      list.appendChild(li)
+    })
+  } catch (error) {
+    text.textContent = "加载失败"
+
+  }
+}
+
+btn.addEventListener("click", load)
\ No newline at end of file
diff --git a/04-dom-events-async/11-input-live-preview/starter.js b/04-dom-events-async/11-input-live-preview/starter.js
index 9ee6472..bbac51a 100644
--- a/04-dom-events-async/11-input-live-preview/starter.js
+++ b/04-dom-events-async/11-input-live-preview/starter.js
@@ -4,3 +4,26 @@
 // 3. 把输入内容实时渲染到右侧预览
 // 4. 监听阶段下拉框的 change 事件
 // 5. 更新阶段标签文字
+const nickname = document.getElementById("nickname-input")
+const goal = document.getElementById("goal-input")
+const stage = document.getElementById("stage-select")
+
+nickname.addEventListener("input", function () {
+  const previewName = document.getElementById("preview-name")
+  previewName.textContent = nickname.value
+  if (!nickname.value.trim()) {
+    previewName.textContent = "未填写昵称"
+  }
+})
+goal.addEventListener("input", function () {
+  const previewGoal = document.getElementById("preview-goal")
+  previewGoal.textContent = goal.value
+  if (!goal.value.trim()) {
+    previewGoal.textContent = "这里会显示你的学习目标。"
+  }
+})
+
+stage.addEventListener("change", function () {
+  const previewStage = document.getElementById("preview-stage")
+  previewStage.textContent = stage.value
+})
\ No newline at end of file
diff --git a/04-dom-events-async/12-prepend-remove-and-link-default/starter.js b/04-dom-events-async/12-prepend-remove-and-link-default/starter.js
index 37879aa..81214b7 100644
--- a/04-dom-events-async/12-prepend-remove-and-link-default/starter.js
+++ b/04-dom-events-async/12-prepend-remove-and-link-default/starter.js
@@ -4,3 +4,26 @@
 // 3. 点击 clear-active-btn 时移除所有 item 的 active 类名
 // 4. 点击帮助链接时，用 preventDefault() 阻止跳转
 // 5. 在提示文字里输出“已阻止默认跳转”
+const prependBtn = document.getElementById("prepend-btn")
+const clear = document.getElementById("clear-active-btn")
+const helpLink = document.getElementById("help-link")
+const hintText = document.getElementById("hint-text")
+const messageList = document.getElementById("message-list")
+
+prependBtn.addEventListener("click", function () {
+  const li = document.createElement("li")
+  li.classList.add("item")
+  messageList.prepend(li)
+})
+
+clear.addEventListener("click", function () {
+  const a = document.querySelectorAll("#message-list li")
+  a.forEach(item => {
+    item.classList.remove("active")
+  })
+})
+
+helpLink.addEventListener("click", function (event) {
+  event.preventDefault()
+  hintText.textContent = "已阻止默认跳转"
+})
\ No newline at end of file
diff --git a/05-es6-plus/01-template-and-destructuring/starter.js b/05-es6-plus/01-template-and-destructuring/starter.js
index a2445dc..ef27516 100644
--- a/05-es6-plus/01-template-and-destructuring/starter.js
+++ b/05-es6-plus/01-template-and-destructuring/starter.js
@@ -9,3 +9,10 @@ const scores = [88, 92, 95];
 // 1. 解构出 name、stage
 // 2. 解构出前两个分数
 // 3. 用模板字符串把信息写入 #output
+const { name, stage } = student
+const [a, b] = scores
+const output = document.getElementById("output")
+output.innerHTML = `
+a = ${a}
+b = ${b}
+`
\ No newline at end of file
diff --git a/05-es6-plus/02-spread-and-rest/starter.js b/05-es6-plus/02-spread-and-rest/starter.js
index 86fbe35..eea85f3 100644
--- a/05-es6-plus/02-spread-and-rest/starter.js
+++ b/05-es6-plus/02-spread-and-rest/starter.js
@@ -7,6 +7,14 @@ const user = {
 
 function sumScores(...scores) {
   // 返回总分
+  /*let total = 0
+  scores.forEach(item => {
+    total = total+item
+  })
+  return total*/
+  return scores.reduce((acc, item) => {
+    return acc + item
+  }, 0)
 }
 
 // 任务：
@@ -14,3 +22,11 @@ function sumScores(...scores) {
 // 2. 基于 user 生成一个 stage 为 "现代 JS" 的新对象
 // 3. 调用 sumScores
 // 4. 输出结果到 #output
+const tracks1 = [...tracks, "ES6+"]
+const user1 = {
+  ...user,
+  stage: "现代 JS"
+}
+const sum = sumScores(1, 2, 3, 4)
+const output = document.getElementById("output")
+output.textContent = sum
\ No newline at end of file
diff --git a/05-es6-plus/03-arrow-functions/starter.js b/05-es6-plus/03-arrow-functions/starter.js
index 29de476..a810b0b 100644
--- a/05-es6-plus/03-arrow-functions/starter.js
+++ b/05-es6-plus/03-arrow-functions/starter.js
@@ -12,3 +12,7 @@ const tracks = ["DOM", "异步", "模块化"];
 // 1. 把 getLevel 改成箭头函数
 // 2. 把 add 改成箭头函数
 // 3. 用 map + 箭头函数生成 ["[DOM]", ...]
+const getLevel1 = score => score >= 80
+const add1 = (a, b) => a + b
+const tracks1 = tracks.map(item => `[${item}]`)
+console.log(tracks1);
diff --git a/05-es6-plus/04-modules-basic/README.md b/05-es6-plus/04-modules-basic/README.md
index 52c8632..3eae9c5 100644
--- a/05-es6-plus/04-modules-basic/README.md
+++ b/05-es6-plus/04-modules-basic/README.md
@@ -1,4 +1,5 @@
-# 练习 4：模块基础
+# 
+练习 4：模块基础
 
 ## 目标
 
@@ -9,7 +10,6 @@
 - `export`
 - `import`
 - `type="module"`
-
 ## 任务
 
 - 从模块文件里导入课程数据和格式化函数
diff --git a/05-es6-plus/04-modules-basic/starter.js b/05-es6-plus/04-modules-basic/starter.js
index e5cd937..2b57662 100644
--- a/05-es6-plus/04-modules-basic/starter.js
+++ b/05-es6-plus/04-modules-basic/starter.js
@@ -1,3 +1,7 @@
 // 任务：
 // 1. 从 ./course-data.js 导入 courses 和 formatCourse
 // 2. 把格式化后的结果写入 #output
+import { courses, formatCourse } from "./course-data.js"
+const a = courses.map(item => formatCourse(item))
+const output = document.getElementById("output")
+output.textContent = a
\ No newline at end of file
diff --git a/05-es6-plus/05-promise-basics/starter.js b/05-es6-plus/05-promise-basics/starter.js
index 5f85a80..18bb84a 100644
--- a/05-es6-plus/05-promise-basics/starter.js
+++ b/05-es6-plus/05-promise-basics/starter.js
@@ -10,3 +10,17 @@ function loadTracks() {
 // 1. 调用 loadTracks()
 // 2. 成功时更新状态和输出内容
 // 3. 失败时更新状态
+async function load() {
+  const status = document.getElementById("status")
+  status.textContent = "加载中"
+  try {
+    const a = await loadTracks()
+    status.textContent = "加载成功"
+    const output = document.getElementById("output")
+    output.textContent = a
+  } catch (error) {
+    status.textContent = "加载失败"
+  }
+
+}
+load()
\ No newline at end of file
diff --git a/05-es6-plus/06-async-await/starter.js b/05-es6-plus/06-async-await/starter.js
index 3b027f2..13e72dc 100644
--- a/05-es6-plus/06-async-await/starter.js
+++ b/05-es6-plus/06-async-await/starter.js
@@ -13,3 +13,16 @@ function loadConfig() {
 // 1. 写一个 async 函数
 // 2. 用 await 等待 loadConfig()
 // 3. 用 try...catch 处理流程
+async function load() {
+  const status = document.getElementById("status")
+  status.textContent = "加载中"
+  try {
+    const a = await loadConfig()
+    status.textContent = "加载成功"
+    const output = document.getElementById("output")
+    output.textContent = JSON.stringify(a)
+  } catch (error) {
+    status.textContent = "加载失败"
+  }
+}
+load()
\ No newline at end of file
diff --git a/05-es6-plus/07-arrow-this/starter.js b/05-es6-plus/07-arrow-this/starter.js
index 1d60c79..3648334 100644
--- a/05-es6-plus/07-arrow-this/starter.js
+++ b/05-es6-plus/07-arrow-this/starter.js
@@ -1,6 +1,11 @@
 const trainer = {
   name: "现代 JS 训练营",
   report() {
+    setTimeout(() => {
+      const a = this.name
+      const output = document.getElementById("output")
+      output.textContent = a
+    }, 1000)
     // 任务：
     // 1. 用 setTimeout
     // 2. 在回调里用箭头函数读取 this.name
diff --git a/05-es6-plus/08-fetch-and-json/starter.js b/05-es6-plus/08-fetch-and-json/starter.js
index 3a22d55..4774a03 100644
--- a/05-es6-plus/08-fetch-and-json/starter.js
+++ b/05-es6-plus/08-fetch-and-json/starter.js
@@ -1,5 +1,5 @@
 const loadButton = document.getElementById("load-btn");
-const status = document.getElementById("status");
+const status1 = document.getElementById("status");
 const output = document.getElementById("output");
 
 // 任务：
@@ -9,3 +9,17 @@ const output = document.getElementById("output");
 // 4. 调用 res.json() 解析数据
 // 5. 把 title 和 body 渲染到页面
 // 6. 失败时显示“加载失败”
+loadButton.addEventListener("click", async () => {
+  status1.textContent = "加载中..."
+  try {
+    let a = await fetch("https://jsonplaceholder.typicode.com/posts/1")
+    let data = await a.json()
+    status1.textContent = "加载成功"
+    const { title, body } = data
+    output.textContent = `title:${title}
+    body:${body}`
+  } catch (error) {
+    status1.textContent = "加载失败"
+  }
+})
+
diff --git a/05-es6-plus/09-final-modern-js/starter.js b/05-es6-plus/09-final-modern-js/starter.js
index d99d101..b4d4c88 100644
--- a/05-es6-plus/09-final-modern-js/starter.js
+++ b/05-es6-plus/09-final-modern-js/starter.js
@@ -5,3 +5,28 @@
 // 4. 用展开运算符合并技能
 // 5. 用模板字符串渲染标题和说明
 // 6. 用 forEach 或 map + 箭头函数渲染列表
+import { baseSummary, loadExtraSkills } from './summary-service.js'
+async function get() {
+  const title = document.getElementById("title")
+  const intro = document.getElementById("intro")
+  title.textContent = '加载中...'
+  intro.innerHTML = ''
+  try {
+    let load = await loadExtraSkills()
+    title.textContent = '加载成功'
+    const { name, stage, skills } = baseSummary
+    intro.textContent = `
+      name:${name}
+      stage:${stage}`
+    load = [...load, ...skills]
+    load.forEach(item => {
+      const li = document.createElement("li")
+      const skillList = document.getElementById("skill-list")
+      li.textContent = item
+      skillList.appendChild(li)
+    });
+  } catch (error) {
+    title.textContent = '加载失败'
+  }
+}
+get()
\ No newline at end of file