题目内容

Recently, there a boom in population movements.

A. is B. was C. has been D. had been

C

【解析】

试题分析:考察时态。根据前面的recently可以判断时态为现在;而后面的population movements是一个延续的动作/状态,只用有现在完成时表示延续,故选C。句意:最近,出现了人口流动潮。

考点:考查现在完成时表延续

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