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20、People can become physically ______ to nicotine, which is one of the hundreds of chemicals in cigarettes.

A. adopted                       B. adapted               C. addicted                   D. attempted

19、 Lucy’s been living in the States for fifteen years, but seldom ______ so lonely as now.

A. has she felt                  B. she had felt            C. she has felt             D. had she felt

18、I have known Mary for years and I am very familiar with her，but I have never been to her home，____ to stay for dinner.  

A. neither          B. not even   C. much less        D. nor

17、---- I hear Johnson was badly injured in the accident.

---- You have been paid enough. _____ do you want?

A. How much        B. What more   C. What else             D. How much more

16、The recent rainy weather which we haven’t met with only ______ our difficulties.

A. added to       B. came to          C. got close to        D. added up to

15、I _____ violin lessons every two weeks, but I think I’ll make it every week from next month.

A. am having    B. have had    C. have    D. have been having

14、Please make my excuse at tomorrow's meeting―I've got too much work _____.
A. to do to come    B. doing coming   C. to do coming     D. doing to come

13、Today Chinese-Americans, _____ in all parts of California, make up a large percentage of its population.

A. to live                           B. living                  C. live                      D. which live

12、---I hear there’s a lot of equipment in your gymnasium.

---Yes. You can choose ______ tools to exercise whatever parts of you body.

A. different               B. special                C. same                 D. several

11、Is it the burning of more fossil fuels ______ is resulting in this increase in carbon dioxide ?

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