问题

hese doctors and nurses tired, Mr. Smith —Yes. ________. They have been operating on thepatient for at least 10 hours.
A:They’re exhausted!
B:You must bejoking!
C:I’m not surprised!
D:They arereally tired of it!
B:You must bejoking!
C:I’m not surprised!
D:They arereally tired of it!
正确答案是: