作业帮Her brother_____the Party since 1978.A.joined B.has joined C.has been in D.was in
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Her brother_____the Party since 1978.A.joined B.has joined C.has been in D.was in
Her brother_____the Party since 1978.A.joined B.has joined C.has been in D.was in
Her brother_____the Party since 1978.A.joined B.has joined C.has been in D.was 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,而since用于完成时,
所以选C
大意：她的哥哥从1978年开始进入这个党派
用现在完成时态表示 而且搭配是 join the party
所以选择 B
答案B，因为since代表现在仍在政党中。
A，D表达过去时态，不符合since用法
而C，有被动参与的意思，不符合句意.