根據(jù)句意和漢語注釋，寫出單詞的正確形式。

The boy is too short．It is ________(不可能)for him to reach the top of the shelf．

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I found a purse ________(lie)on the ground when I passed the shop．

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We were angry because she entered the room without ________(knock)．

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Mr．Wang, would you please ________(not tell)it to my father?

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The passengers on the bus could do nothing but ________(wait)for the help from the police as there was no road ahead．

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Helen ________(leave)her keys in the office．So she has to wait until her husband comes home．

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Ni Ni ________(choose)to act in Zhang Yimou's film, wasn't she?

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–Have you ever read a book called Waiting for Anya?

–Who ________(write)it?

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The students will go to the zoo if it ________(not be)rainy this Sunday．

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Our teacher told us that glass ________(feel)much colder than wood in winter．