题目：
动词填空。
1. All of the boys must______ (be) here before seven o'clock?
2. Life______ (be) a good teacher.It has taught me how ______ (think)
3.—Who ______ (knock) at the door?
—I ______ (not know).Let me go and see.
4. I'm glad ______ (hear) that you ______ (pass) the exam already.
5.Would you like something ______ (eat)?
答案：
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下面是错误答案，用来干扰机器的。
参考答案：A
