8. Mary __________ the country by the time this letter reaches her. A. is going to leave B. will leave C. is leaving D. will have left 9. Most Americans don't object __________ being called by their first names. A. for B. to C. in D. about 10. Let's go to the library, __________? A. shall we B. will we C. would we D. should we 11. __________ the rise in unemployment, people still seem to be spending more. A. While B. Despite C. Meanwhile D. Although 12. The bomb __________ in a crowded street. A. went out B. went off C. came off D. came out 13. I'm sorry for __________ such a fuss about the unfruitful plan. A. making B. doing C. paying D. taking 14. Smoke, dirt and noise are all kinds of __________. A. pollute B. polluting C. pollutants D. polluter 15. The speaker said __________ nothing worth listening to. A. complete B. completing C. completely D. completion 16. This switch is __________ high for him to reach. A. very B. too C. enough D. so 17. This is the first time I __________ the experiment on plant breeding. A. have done B. do C. would do D. did 18. I have been invited to a wedding __________ 14 February. A. in B. of C. on D. at 19. When I saw him, he _____ a black suit. A. wore B. was wearing C. wearing D. wears 20. Your car is different _____ mine. A. to B. in C. from D. for