Ⅰ.单项选择
( )1.[2017·西宁改编]—What will the weather be like tomorrow?
—It ________ be rainy, cloudy or sunny. I'm not sure.
A．must B．might C．can't
( )2.[2017·长春改编]—Is the man in the car John?
—No, it ________ be him. He went to Xi'an on business yesterday.
A．can't B．must C．mustn't
