The government has taken some measures to prevent more trees from _____.
A．cutting down B．cut down.
C．being cut downD．been cut down
C

試題分析：句意：政府已經(jīng)采取了一些措施來阻止樹木被砍伐。prevent sb from doing sth阻止某人做某事，樹木應(yīng)該是被砍伐，運(yùn)用現(xiàn)在分詞的被動(dòng)形式，being done,故選C
點(diǎn)評：解答好此類被動(dòng)語態(tài)的題目，首先需要對句意有充分的理解，其次注意被動(dòng)語態(tài)的基本形式。對于各個(gè)時(shí)態(tài)的被動(dòng)語態(tài)，學(xué)生在平時(shí)的學(xué)習(xí)中都必須了然于心，同時(shí)對于常見短語的被動(dòng)形式，特定的詞后面所接的特定的動(dòng)詞形式都要有一個(gè)全面的了解和掌握。
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