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【题目】Since 1949, the peoples living standard _______, causing a big _______ in population.

A. has been raised; rise B. has been rose; raise

C. has raised; rise D. has raised; rose

【答案】 A

【解析】

试题分析:考查现在完成时。句意:自从1949年,人们的生活标准已经有了很大的提高,在人口上也有一个很大的增长。第一个空,有明显的时间点,所以用现在完成时,第二个空rise是名词,所以用原型,所以选A。

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