(1)They filled with joy when they __________Chinese soil in late July．

(2)He said he would never _________that house again．

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It's an explanation often _________by our friend．

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Who knows what the future has ________for us？

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In the Process of ________，some birds lost the power of flight．

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Many students signed up for the _________race in the sports meeting to be held next week．

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The conference has been held to discuss the effects of tourism________ the wildlife in the area

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The two thieves fled the town separately, ________ a bag.

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________ human beings depend to a great extent on forests, every effort must be made to preserve trees and wildlife.

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I don't think ________ possible to master a foreign language without memory work.

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I can think of many cases ________ students obviously knew a lot of English words and expressions but couldn't write a good essay.

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