Theymusthavelearnt5000Englishwordsbytheendoflastterm,

問題詳情：

 They must have learnt 5000 English words by the end of last term, ________?

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

【回答】

C

知識點：疑問句 反義疑問句

題型：選擇題