Itiscoldintheroom.Theymusthaveturnedoffthesteam,...
來源：國語幫 6.06K
問題詳情：
It is cold in the room. They must have turned off the steam, _______?
A. mustn’t they B. haven’t they C. didn’t they D. have they
【回答】
B
知識點：疑問句 反義疑問句
題型：選擇題
