21.-- Have you ever heard of an American president called Chester A.Arthur?

　 -- No, and he’s not mentioned in my history book at all. He seems 　　　　　　.

A. to have been completely forgotten 　　　　　　　　　 B. having completely forgotten

C. to have completely forgotten 　　　　　　　　　　　　　 D. completely forgetting

20. Mrs. Green took up the story at the point 　　　　the thief had just made off with the jewels.

A. where 　　　 　　　　　　B. which 　　　　 　　　　C. as 　　　　 　　　D. when

19. This price _______ the cost of all the accommodation and food.

A. takes up　　　　　 B. takes off　　　　　 C. takes over　　 D. takes in

18. The report urged that all the children ___ to swim.

A. are taught 　　　　B. be taught 　　　　　C. to be taught 　　D. teach

17. I thought she was the very girl that I should marry _______ I met her.

A. first time　　　　　 B. for the first time 　　C. the first time　 D. by the first time

16. He spends _______ 1,000 dollars on stamps each year, but he still hasn’t got _______ as Amy does.

A. as many as, as a big collection 　　　　　　B. as much as, as big a collection

C. as many as, a collection as big　　　　　　 D. as large as, as big as a collection

15. The farm as well as its neighbouring hills we once spent so much time on ________　 a new look recently.　

A. has taken　on　　 　 B. have taken　on　 　　C. having taken　on　 D. had taken on

14. The　foreign　student　doesn't　__________the　life　here. He　often　gets　ill. A. adapt for　　　　 　 B. fit　for　　　　　　 C. fit　in　with　　　　　 D. live with

13. They­­ got two free tickets to Canada, ____ they’d never have been able to afford to go.

A. therefore　　　　 　B. however　　 　　C. otherwise　 　　　D. besides

12. Busy as they are, parents should ______ at least two hours to spend with their children.

A. set out　　　　　 　B. set up　　　　 　　C. set aside　　　　 D. set off