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His father ______ the Party since 1978 .

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His father ______ the Party since 1978 .
　　A.joined B.has joined C.was in D.has been in
He _____ the Army by the end of 1992.He ____ in the army since then.
A.joined…is B.has joined…has been
C.had joined…is D.has joined… has been
为什么第一题不能选 has joined ,但第二题可以选 has joined
首先你可以看到其实第一题和第二题后半部是一样的题目,都是has been in...since+过去时间.那么为了强调一个状态（即他爸爸是党员/军人)的持续性,我们要用has been.如果has joined...since,那就变成了是【暗示】join这个动作的持续性了（意思就变得很搞笑,就是他爸爸这几十年一直在入党/入军籍,在第一题里没有语境还说可以考虑考虑,但第二题就明显不可能了）
而至于第二题的第一空,我持保留意见,不应该是has joined,而应该是had joined.主要是注意到后面的时间状语by the end of 1992,是过去完成时的标志性状语（当然by the end后所加需得是过去时间）.这里便不是表示join的持续性了,而是表示join这个动作发生在1992年之前,强调动作先后关系.
His father ______ the Party since 1978 . 现在完成时:单项选择　11、 His father ______ the Party since 1978 .　　A.j His father ___the Party since 1978. his father ____the party since 1978 A.joined B,has joined C. His father ___the Party since 1978.A:joined B:has joined C:w His father has been lived in the town since 1950... His father joined the party in 1939的同义句His father（ ）（ ）a par Since his father died three years ago,he ______(not,pay) any John,together with with his sisters,______ the evening party The lazy bone pretended ______ earnestly when his father cam 改为同义句?1.He has taken charge of the company since his father His father drove him to the party yesterday ,改同义句