题目内容

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

[　　]

A．has completed
B．have completed
C．have been completed
D．has been completed

答案：D
解析：

由by now时间状语看，应用现在完成时；从文意看，应用被动语态，从主谓一致看，应使用单数，故选D项。


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