练习Practice
动手做Get your hands on it
练习跟着课文走 —— 每节课尾都有本课的练习。这一页是全部练习的总库，想集中刷题的时候来。 每个练习都写清了它来自哪一节，卡住了就回去看那一节。Practice follows the lessons — every lesson ends with the exercises for that lesson. This page is the whole library, for when you want to drill in one sitting. Each exercise names the lesson it came from, so you can go back when you stall.
0 / 148个做对过you got right
练习Exercises
筛出 50 个练习（共 148 个） · 第 5 / 5 页。Showing 50 of 148 · page 5 / 5.来自From 历史与确认页：两个小而致命的细节The history and confirmation pages: two small details that decide pass or fail · Cab BookingCab Booking
L1认出来Spot it哪些写法能让测试 4 全绿？（多选）Which versions make test 4 pass? (more than one)
历史是
[Fusion, Accord, Highlander, Explorer]（最旧 → 最新）。 断言要求：3 条、顺序Explorer / Highlander / Accord、Fusion 不在 DOM 里。The history is [Fusion, Accord, Highlander, Explorer] (oldest → newest). The assertions want: 3 entries, in the order Explorer / Highlander / Accord, and Fusion not in the DOM.这题是多选。More than one answer is correct.
先选一个选项Pick an option first
来自From 完整答案跑不起来 —— 一个扩展名的事The complete answer does not run — the cause is one file extension · Cab BookingCab Booking
L1认出来Spot it下面哪些说法是对的？（多选）Which of these statements are correct? (more than one)
关于源项目那两处「能过但可以更好」的写法。About the two places in the source project that pass the tests but could be better.
这题是多选。More than one answer is correct.
先选一个选项Pick an option first