问题
选择题
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
答案：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……”。
