用HAVE 因为这里不能作为一个整体看.
只有类似如 20YEARS (IS) A LONG TIME .这一类的句子一定是用谓语单数,因为这里他看作一个整体
Twenty years ______ passed since I came here.填的是 have 还是 has.为什么?
Twenty years ______ passed since I came here.填的是 have 还是 has.为什么?
英语人气：860 ℃时间：2019-11-13 02:26:49
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