You must do_ homework every day.4.What are the students doing?_are putting_books on the shelf.
问题描述：
You must do_ homework every day.4.What are the students doing?_are putting_books on the shelf.
答
Me too
答
You must do (your) homework every day. (你要天天做你的作业)
.What are the students doing? (They) are putting (their) books on the shelf. （这些学生在干什么？ 他们在把他们的书放在架子上）
答
You must do_your homework every day. 4.What are the students doing? _they are putting their_books on the shelf.
答
your 你的，They, their
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