20、My most famous relative of all, _______ who really left his mark on America, was Reb Sussel, my great-grandfather.

A. one     B. the one       C. he       D. someone

19、--- I don’t suppose the police know who did it.

--- Well, surprisingly they do. A man has been arrested and ________ now.

A. has been questioned                                      B. is being questioned

C. is questioning                                               D. has questioned

18、This new model of car is so expensive that it is _______ the reach of those with average incomes.

A. over           B. within        C. beyond       D. below

17、--- Are you going to have a holiday this year?

--- I’d love to. I can’t wait to leave this place _______.

A. off             B. out             C. behind        D. over

16、The committee is discussing the problem right now. It will _______ have been solved by the end of next week.

A. eagerly              B. hopefully           C. immediately              D. gradually

15、Although medical science __________ control over several dangerous diseases, what worries us is that some of them are returning.

A. achieved     B. has achieved      C. will achieve       D. had achieved

14、--- It took me ten years to build up my business, and it almost killed me.

--- Well, you know what they say. _________.

A. There is no smoke without fire                      B. Practice makes perfect

C. All roads lead to Rome                                  D. No pains, no gains

13、The owner of the cinema needed to make a lot of improvements and employ more people to keep it running, ______ meant spending tens of thousands of pounds.

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

12、Whenever he was asked why he was late for class, he would answer carelessly, always ______ the same thing.

A. saying        B. said            C. to say        D. having said

11、_______ environmental damage is done, it takes many years for the ecosystem (生態(tài)系統(tǒng)) to recover.

A. Even if              B. If only        C. While         D. Once