His father ___the Party since 1978.A:joined B:has joined C:was in D:has been in

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His father ___the Party since 1978.A:joined B:has joined C:was in D:has been in
His father ___the Party since 1978.A:joined B:has joined C:was in D:has been in

His father ___the Party since 1978.A:joined B:has joined C:was in D:has been in
has been in,since 1978是一个持续的动作,而join是一瞬间完成的动作,故不能用A、B,而since用于完成时,C是过去时,故D

D 有since典型的完成时标志 而且要用延续性的动词。所以选D