Itiscoldintheroom.Theymusthaveturnedoffthesteam,...
来源：语文精选馆 7K
问题详情：
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
知识点：疑问句 反义疑问句
题型：选择题
