It’scoldintheroom．Youmusthaveturnedoffthesteam,

问题详情：

It’s cold in the room．You must have turned off the steam,_____ you?

A．don’t                  B．didn’t                 C．haven’t                  D．mustn’t

【回答】

B

知识点：疑问句 反义疑问句

题型：选择题