题目内容
12.Chinahas seen(see) a sharp increase in the number of aged people over the past decade.分析 中国在过去的几十年里见证了老年人数量的剧增.
解答 答案:has seen.根据"over the past decade"判断see应用现在完成时,而主语China为单数,故填has seen.
点评 本题考查现在完成时的用法.结合相应的时态标志词、短语及句意来选择正确的时态.
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