题目内容

He ________ the Army by the end of 1989. He ______ in the army since then.

A. joined…is B. has joined…has been

C. had joined…is D. had joined …has been

D 【解析】句意:他在1989年底已经参军了。自从那个时候,他已经参军了。短语join the Army参军;根据时间状语by the end of 1989可知用过去完成时,其结构是had done的形式;根据时间状语since then可知是谓语动词用持续性的,have been in the army表示参军,根据题意,故选D。
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