Twenty years ---long for us but only a short time in human h

问题描述:

Twenty years ___long for us but only a short time in human history A is B are Cwas Dwere
1个回答 分类:英语 2014-11-23

问题解答:

我来补答
Twenty years ___long for us but only a short time in human history A is B are Cwas Dwere
选A
twenty years看成一个整体
谓语动词用单数
又因为说的是一个事实
所以用一般现在时
 
 
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