A lot of things ( )in China since 1978 A.was happened B.have happened C.have been happenedD.happened

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A lot of things ( )in China since 1978 A.was happened B.have happened C.have been happenedD.happened

A lot of things ( )in China since 1978 A.was happened B.have happened C.have been happenedD.happened
A lot of things ( )in China since 1978 A.was happened B.have happened C.have been happened
D.happened

A lot of things ( )in China since 1978 A.was happened B.have happened C.have been happenedD.happened
B 因为happen 是一个不及物动词,所以没有被动语态,所以A C都被排除了,
句子的意思是自从1978年以来,中国发生了很多事.

B 事情的发生只能是主动结构,since是完成时的标志

选b
since是现在完成时的标志,happen不能用于被动,

B

B