(2010·北京高考)—Good morning. I've got an appointment with Miss Smith in the Personnel Department.
—Ah, good morning. You ________ be Mrs. Peters.
A．might B．must
C．would D．can
(2011·江西高考)It ________be the postman at the door.It's only six o'clock.
A．mustn't B．can't
C．won't D．needn't
(2013·安徽高考)It ________ be the vocabulary that caused you the problem in the exercise because you know a lot of words.
A．may B．couldn't
C．should D．needn't
(2013·重庆高考)—What are you doing this Saturday?
—I'm not sure, but I ________ go to the Rolling Stones concert.
A．must B．would
C．should D．might
(2012·全国卷Ⅱ)I'm going to Europe on vacation together with John if I ________ find the money.
A．can B．might
C．would D．need
(2013·湖南高考)He ________ sleep, although he tried to, when he got on such a hunt for an idea until he had caught it.
A．wouldn't B．shouldn't
C．couldn't D．mustn't
