【題目】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】試題分析：本題考查條件狀語(yǔ)從句中動(dòng)詞的時(shí)態(tài)。

結(jié)合句意可知，空格處句子表達(dá)“如果你不去做的話，誰(shuí)敢說(shuō)還有其他人去做呢？”，是對(duì)現(xiàn)在的一般性假設(shè)，主句用將來(lái)時(shí)，從句用一般現(xiàn)在時(shí)，構(gòu)成“主將從現(xiàn)”。故正確答案為B。

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