1 . Hannah一定是在承诺不告诉他人之后将我的成绩告诉了我的同学们。（must）

2 . How fantastic his spoken English is! He_____ abroad for several years.

A．may stay

B．must have stayed

C．can stay

D．must have been staying

3 . —The expression on his face suggests he ________ have failed in the competition.
—I guess so. It’s not easy after all.

A．should	B．could
C．must	D．might

4 . —Your friend knows a lot about different cultures in the world .
—Really. He ____________ many places because he likes travelling.

A．must visit	B．may visit
C．must have visited	D．should have visited

5 . She _____ the book sometime in the past as there is no way she could have answered the questions so accurately.

A．ought to read	B．must have read
C．must read	D．should have read

6 . ---I have looked for my keys everywhere, but I can’t find them.
---Sorry to hear that. You _____ them somewhere.

A．must lose	B．should lose
C．must have lost	D．should have lost