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3. 进人实验室前，你必须按照老师说的去做。

You must do                   before entering the lab.

3. as the teacher said

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(   ) 3. [2015 •重庆B] The joke was so funny that it made him       again and again.

   A. laugh   B. to laugh

   C. laughed   D. laughs

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4. The old man is       (期待着) her daughter's visit.

(   ) 6. [2014 • 嘉兴]Tom       the piano every day when he was in primary school.

   A. plays   B. played

   C. was playing   D. has played

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    3. We shall be asked to take part in the party. (改为一般疑问句) 

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