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问题 单项选择题

有限空间内盛装或者残留的物料对作业存在危害时，作业前应对物料进行清洗、清空或者（），危险有害因素符合相关要求后，方可进入有限空间作业。

A.置换

B.调换

C.更换

D.转换

答案

参考答案：C

填空题

金石的“金”指（）；金文则指商周时期刻于其上的文字。
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句型转换

句型转换。

1. You are supposed to shake hands with your friends.(改为同义句)

    You _____ _____ _____ with your friends.

2. It's even better than I thought it would be.(改为反意疑问句)

    It's even better than I thought it would be _____?

3. I knew what l was supposed to do.(改为否定句)

                                               _____.

4. This exercise is easier than the other two.(改为含有最高级的句子)

    This exercise _____ _____ _____ _____ _____ _____．

5. The man driving the red car is my boss.(改为含有定语从句的句子)

    The man my boss _____ _____ _____ _____ _____ _____ _____.
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