Today the forests are getting fewer and fewer. We must ______ down too many trees.
A．keep people from cuttingB．prevent people from cutting
C．stop people cuttingD．a(chǎn)ll the above
D

試題分析：句意:今天森林越來越少，我們必須阻止人們砍伐太多的樹。Keep/ prevent/ stop sb from doing阻止某人做某事；所以ABC三個選項都正確，根據(jù)句意故選D。
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