Question

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

[　　]

A．

has been completed

B．

have been completed

C．

has completed

D．

have completed

Answer 1

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。