His father ________ in the factory since he was twenty._刷题宝

题干

His father ________ in the factory since he was twenty.

A：work

B：has worked

C：will work

D：was working

上一题下一题 0.0难度选择题更新时间:2018-02-09 06:34:00

答案(点此获取答案解析）

B

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