高等继续教育 / 大学英语语法
正确率:100%
题型描述: 单选题
The construction of the laboratory ______ by the end of next month.
A.must have been completed
B.must have completed
C.must complete
D.must be completed
The construction of the laboratory ______ by the end of next month.
A.must have been completed
B.must have completed
C.must complete
D.must be completed
参考答案:
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