Someone must have taken it away this morning ?A. haven’t theyB. hasn’t heC. don’t theyD.

问题补充：

Someone must have taken it away this morning, ?

A. haven’t they

B. hasn’t he

C. don’t they

D. didn’t he

答案：

A. haven’t they

B. hasn’t he

C. don’t they

(答案→)D. didn’t he

解析：本题考查反义疑问句。Must have done的反义疑问句，如果有时间状语，则用didn’t +主语，没有则用haven’t/hasn’t +主语。根据句中时间状语this morning,，故选D。