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Nearly half a million people are believed _________ their homes in the past months as a result of the disaster.

 A. to leave        B. to have left      C. to be leaving    D. to be left

 

【答案】

B

【解析】

试题分析:考查非谓语的用法。句意:人们相信几乎有50万人在过去的数个月中由于灾难的原因而离开了家园。在句型sb /sth +is said to do 中,如果不定式动作发生过了,则用不定式的完成式to have done表示; 如果将要发生,则用不定式的一般式to do表示; 如果不定式动作正在发生,则用不定式的进行式to be doing表示。在此句中 in the past months 提示动作已经发生,则应该用不定式的完成式。所以B选项正确。

考点:考查非谓语的用法

 

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