They must have been here the day before yesterday,＿＿＿＿?
A.mustn’ttheyB.didn’ttheyC.mustn’thavetheyD.hadthey...
A. mustn’t they
B. didn’t they
C. mustn’t have they
D. had they 展开
B. didn’t they
C. mustn’t have they
D. had they 展开
1个回答
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