题目内容
Today the forests are becoming smaller and smaller. We must ________ too many trees.
A.prevent people to cut down B.prevent people from cutting down
C.keep people cutting down D.stop people to cut down
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题目内容
Today the forests are becoming smaller and smaller. We must ________ too many trees.
A.prevent people to cut down B.prevent people from cutting down
C.keep people cutting down D.stop people to cut down