问题
选择题
The construction of the two new railway lines ________ by now.[ ]
A. had completed
B. have been completed
C. has been completed
D. had been completing
答案
答案：C
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The construction of the two new railway lines ________ by now.[ ]
A. had completed
B. have been completed
C. has been completed
D. had been completing
答案：C
