The construction of the two new railway lines          by now.

       A．has completed                                B．have completed

       C．have been completed                       D．has been completed

A． 

解析：本題旨在考查考生綜合使用時(shí)態(tài)和被動(dòng)語態(tài)的能力。時(shí)間狀語by now 為完成時(shí)典型標(biāo)志詞。答案為A

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