Question

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

1. A.
   has completed
2. B.
   have completed
3. C.
   have been completed
4. D.
   has been completed

Answer 1

D
解析：
句意：兩條新鐵路線的建設(shè)到現(xiàn)在已經(jīng)完成了。此題在選擇的時(shí)候要注意：一要把握好時(shí)間狀語by now，句子中要用現(xiàn)在完成時(shí)；
二要注意句子的主語為construction，謂語動詞應(yīng)用單數(shù)形式；
三要注意用被動語態(tài)。