2 . — That woman has been taking care of the two white tigers for 8 years.
—Oh, dear! She _____ a lot of difficulties!

A．could go through	B．might go through
C．might have gone through	D．must have gone through

3 . Tony looks so happy. He ________ a contract with the famous basketball club.

A．should sign	B．should have signed
C．must sign	D．must have signed

4 . During our trip to the Great Wall last week, I couldn’t stop thinking that building it ________ have been a huge project in ancient times.

A．should

B．must

C．could

D．need

5 . The children____________ very excited as they received the handwritten letter from Father Christmas.

A．may be

B．should be

C．must have been

D．could have been

7 . Your cousin ________ his trip in Jixian County, didn’t he? He looks amazingly different.

A．will have enjoyed	B．should have enjoyed
C．can have enjoyed	D．must have enjoyed

8 . —Few of my fellows passed the politics quiz this time on campus.
—How come? It ________ tough.

A．should be	B．might be
C．must have been	D．could have been

9 . It is cold and the ground is wet; it ________ have rained last night.

A．might

B．can

C．must

D．should

10 . —I saw Lily in the teacher’s office just now.
—You _________ her, she has gone back home.

A．must not see

B．mustn’t have seen

C．can’t have seen

D．couldn’t see