–Why don’t you stay at the Baotuquan Hotel?
--You ! Do you know how expensive that place is?
A. must be joking
B. can’t be joking
C. must joke
D. can joke
网友回答
(答案→)A. must be joking
B. can’t be joking
C. must joke
D. can joke
解析: 情态动词考查题。Must be doing 表示对正在发生的事情的推测。 “为什么不呆在趵突泉宾馆呢?”“你在开玩笑吧!你知道那地方多贵吗?” 选A