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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
C
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……”。
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