题目内容
【题目】That's why I help brighten people's days. If you ________, who's to say that another person will?
A.didn't
B.don't
C.weren't
D.haven't
【答案】B
【解析】考查动词的时态,根据主句中 another person will可知,此处隐含将来的动作,但是条件状语从句中通常用现在时表示将来的动作,故选B这就是我为什么为别人的生活增添乐趣,如果你不这样做的话,天知道还会有谁做

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