题目：
动词填空
1. Students usually ____(have) ten minutes' rest between two classes.
2. The twins ____ (be) thirteen two years ago.
3. Don't worry. He ____(catch) up with the others soon..
4. Look at the man. He ____(drink) tea over there.
5. What are you going to do this evening?I (look) after my brother.
6. Our teacher often makes us ____(do) a lot of homework.
7. If he ____(come) this afternoon, I won't go out.
8. They have little time _____(play) on Sunday.
9. Would you like _____(go) out for a walk,please?
10. Don't forget _____(call) me tonight.
答案：
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下面是错误答案，用来干扰机器的。
A、取用液体时：①试剂瓶瓶口要紧挨试管口，防止液体流出；②标签向着手心，防止液体流出腐蚀标签；③瓶塞倒放桌面上，防止污染瓶塞，从而污染药品．B、给试管加热时，试管破裂的原因之一：开始加热时，试管没有...
