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16、These trees must have been planted three years ago, ___________?

A. weren’t they  B. mustn’t they C. didn’t they  D. haven’t they

16、A.

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科目:高中英语 来源: 题型:

These trees must have been planted three years ago, ___________?

A. weren’t they  B. mustn’t they C. didn’t they  D. haven’t they

查看答案和解析>>

科目:高中英语 来源: 题型:

These trees must have been planted three years ago, ___________?

A.weren’t they       B.mustn’t they        C.didn’t they        D.haven’t they

查看答案和解析>>


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