20．Every one of you must put every book where they ________ just now and leave immediately.

A．take away　 　　　B .were taken away 　 C．are taken away　 D．took away

19．The global economic crisis will continue until next year，when the situation ________ to improve.

A．is expected　 　　　B．is expecting　　　　　　　 C．expects　　　　　　 D．will be expected

18．-Mark broke his leg when he was playing football.

-How long ago ________ that?

A．has been　 　　　　B．had been　　　　　　　　　 C．is 　　　　　　　　　 D．was

17．I ________ for a whole hour and he ________ up yet.

A．have waited；hasn’t turned　　　　　　　　　　　 B．have been waiting；hasn’t turned

C．have been waiting；hasn’t been turning　　　 D．have waited；hasn’t been turning

16．I ________ with a foreigner，Mr.Green.I ________ with him in the People’s Park.

A．have talked；have talked　　　　　　　　　　　　　　 B．had talked；had talked

C．talk；talked　　　　　　　　　　　　　　　　　　　　　　　 D．have talked；talked

15．-How long ________ the mobile phone?

-For five years.

A．have you had 　　　　　　　　　　　　　　　　　　　　　　 B．have you bought

C．had you had　 　　　　　　　　　　　　　　　　　　　　　　 D．did you buy

14．-Do you happen to know the star’s telephone number?

-He ________ me his，but I’m afraid I ________ it.

A．has given；lost　　　　　　　　　　　　　　　　　　　　　　　　 B．has given；have lost

C．had given；had lost　 　　　　　　　　　　　　　　　　 D．gave；have lost

13．I don’t know when he ________ back，but when he ________，I’ll let you know as soon as possible.

A．will come；comes　　　　　　　　　　　　　　　　　　　 B．comes；will come

C．will come；will come　 　　　　　　　　　　　　　　 D．comes；comes

12．-Have you worked out the troublesome problem yet?

-Yes.I ________ it out with the help of my wife after dinner.

A．have worked 　　　　 B．worked　　　　　　　　　 C．had worked 　　 D．am working