27) The construction of the laboratory ____by the end of next month.

题目

27) The construction of the laboratory ____by the end of next month.
A) must be completed
B) must have been completed
C) will be completing
D) will have been completing

答案

The construction of the laboratory _B___by the end of next month.A) must be completedB) must have been completedC) will be completingD) will have been completing ----"by end of +将来时间",动词用“将来...