1 . It is hard to say what kind of person he is. Sometimes he is very friendly; at other times he ___ be very cold.

A．can

B．must

C．will

D．shall

2 . 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

3 . (2013·天津，9)No one________ be more generous；he has a heart of gold.

A．could

B．must

C．dare

D．need

4 . –Hey! Any idea about learning abroad?
--You _____google the College Board to learn the names of college you ____ be interested in

A．may; need

B．can; might

C．will; should

D．shall; must

5 . It doesn’t often snow in my hometown in winter, but it ___be rather cold sometimes.

A．shall

B．should

C．can

D．would

6 . Some aspects of a pilot’s job__________ be boring, and pilots often ________ work at inconvenient hours．

A．can; have to

B．may; can

C．have to; may

D．ought to; must

7 . —What        it be?
—It        be a man, for it is not moving. It        be a dustbin, I think.

A．can; may; must	B．can; can’t; must
C．can; must; can	D．may; may not; could

8 . Most of the big hotels in Shanghai were full last week, but finally we______find a room in a small one.

A．ought to

B．could

C．were able to

D．might

9 . So far no life has been found outside the earth, but while some scientists are actively searching for living things in outer space, others firmly believe there ____ .

A．mustn’t be

B．may not be

C．can’t be

D．won’t be

10 .    It is usually warm in my hometown in March, but it _____ be rather cold sometimes.

A．must

B．can

C．should

D．would