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Enough _______ to stop the forest _______ since the 1980’s.

[  ]

A.has been done; be cut down

B.has done; cutting down

C.has been done; being cut down

D.had done; from being cut down

答案:C
解析:

考查时态和非谓语动词。since the 1980’s是现在完成时的标志,根据语境应该用被动形式;stop sth. (from) being done是“阻止……被做……”的意思。


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E  
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