Only in the past hundred years when electric lightening was developed ___ able to live,work and move about as if night n
问题描述：
Only in the past hundred years when electric lightening was developed ___ able to live,work and move about as if night no longer existed.
A.has man been B.man has been C.have man been D.man have been
解释下has 和have吧.
答
选A 这句话是Only从句倒装 谓语结构要用反的 就是把动词提前 而此处的人类man是个统称 我们把它看成是单数名词 所以用has.
understood