My brother _____ while he _____ his bike and hurt himself
题目
My brother _____ while he _____ his bike and hurt himself
A.fell was riding B.fell were riding C.was falling rode D.was falling riding 选哪个?为什么?
答案
A
while 后的动词用进行时,排除 C D ,主语是HE 再排除B
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