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By the time he was 15,the boy___to make a living by himself
A.would begin B.has begun C.had begun D.began
人气:426 ℃ 时间:2020-03-25 10:40:15
解答
选 C
by the time he was 15 ,意思是:到他15岁为止
这种时间状语用于过去完成时.
意思是:到他15岁为止,这个男孩已经开始独自谋生了.
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