—A medical team was sent to Japan by air five hours ago.
—So they ______________ have arrived by now. The flight usually takes four hours or so.
| A．might | B．could | C．must | D．need |
Walking exercises ____ be boring at times, but on a clear sunny morning nothing could be better．
| A．may | B．will | C．must | D．should |
Don’t play with the dog, Jack, for it ______ be dangerous at times.
| A．shall | B．can | C．should | D．must |
— Peter was admitted to a second－class college.
— He ________ a top university, but he was addicted to playing computer games.
| A．had entered | B．would enter | C．must have entered | D．could have entered |
— I am going to the dentist at 4 o'clock and it is 3：30 now.
— Well, if you ______ leave earlier today, please ask the director for permission.
| A．can | B．may | C．must | D．will |
One of the rules is that every student ________ wear school uniform while at school.
| A．might | B．could | C．will | D．shall |
—Must I return the book tomorrow?
—No, you ________.You can keep it for three days.
| A．mustn't | B．needn't | C．can't | D．may not |
I __________use a clock to wake me up because at six o'clock each morning the train comes by my house.
| A．couldn’t | B．mustn’t | C．shouldn’t | D．needn’t |
—I visited France last year.
—That interesting.
| A．was | B．can be | C．must be | D．must have been |
—Why, my new computer is rubbish! Five hours has passed and it still hasn’t finished the downloading.
—Don’t worry. You know, sometimes the Internet ________ be very slow.
| A．can | B．may | C．should | D．must |
It is usually warm in my hometown in March, but it _____ be rather cold sometime.
| A．must | B．can | C．should | D．would |
----Will Barbara come to our party?
----I am not sure, because he ____ go to the concert with his friend.
| A．can | B．must | C．should | D．might |
----- Mary looks very upset. She _______ failed to pass the exam.
----- I guess so. It's very difficult after all.
| A． must have | B．could have | C．should have | D．might have |
“No student,”the headteacher stressed, “_______ go out of the school after ten o’clock at night without my permission. ”
| A．shall | B．will | C．must | D．may |
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