21、The precious necklace, ________ last year, has never been found.

A．stolen            B．was stolen               C．being stolen           D．to be stolen

20、With the development of economy, payment by installment is widely ________ in our country.

A．adopted        B．adapted               C．allocated               D．abused

19、Don't do to others ________ you wouldn't have others do to you.

A．that        B．which             C．while                D．what

18、The Ministry of Health in China has sought the advice of scientists, ________have done research of the swine flu virus.

A．which        B．that           C．who           D．whom

17、- How would you like to pay? Cash or charge?

- Is there any difference ________ I pay?

A．how                  B．how much                C．what        D．which

16、- The teacher talks so fast, I have a hard time absorbing what he says.

- Someone should tell him to ________

A．slow down         B．break down             C．turn down              D．cut down

15、-We have an important meeting at 10 a.m. this Sunday.

- So I have no choice but ________ my appointment.

A．cancel        B．to cancel               C．canceling                   D．be cancelled

14、- What do you think of Tolstoy?

- I'm not ________ his writings.

A．similar to     B．familiar with              C．crazy about            D．sensitive to

13、- I think the actress in this film is pure eye candy.

- I'm afraid ________. She acted her part well

A．I can't agree more                   B．I can't agree with you

C．I have to admit it                    D．I'm not so attracted