题目内容
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
试题答案
16、A.
相关题目
题目内容
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
试题答案
16、A.