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The construction of the two new railway lines ________ by now.

[  ]
A.

has been completed

B.

have been completed

C.

has completed

D.

have completed

答案:A
解析:

由时间状语by now可判断这里应该用现在完成时。根据主谓一致的原则,题干的主语为construction,为单数,故谓语动词应用has,排除B、D项。construction和complete之间为动宾关系,故应用被动语态,排除C项。


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