“are”改成“is”
three hours指的是时间的概念,是一个整体,为不可数名词
指出下面这句话中的错误,并说明理由
指出下面这句话中的错误,并说明理由
Three hours are enough to look at the pictures carefully.
Three hours are enough to look at the pictures carefully.
英语人气：615 ℃时间：2019-11-10 15:02:11
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