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
科目:高中英語 來源: 題型:
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
科目:高中英語 來源: 題型:
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
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