4. Breathing polluted air every day mayin respiratory problems. A. cause B. make C. result D. lead 5. If the teacher were now here, we him the difference science and technology. A. would ask/ between B. would asked/ between C. would ask/ among D. would asked/ among 6. After three hours of considering, we have decided.the final decision. A. making B. to make C. to making D. make 7. If I.a scientist, I would do a lot research on turning salt water into fresh water. A. am B. was C. were D. had been 8. Which TV programme .. at 9p.m tomorrow? A. did you watch B. will you watch C. will you be watching D. had you watched 9. I hope you when I arrive at 2 p.m today. A. didnt work B. wont be working C. dont work D. wont work 10. When she comes home late today, he the dinner. A. cooks B. is cooking C. will cook D. will be cooking 11. Were decided .. in Ho Chi Minh city for three more days. A. stay B. staying C. to stay D. stay 12. We enjoy .TV a lot. A. watch B. watching C. to watch D. watched 13. Do you want .. a mobile phone battery that uses solar energy? A. having B. to have C. has D. had 14. The road in front of my house is being A. repair B. to repaired C. repairing D. repaired 15. They chose the bus there. A. to take B. will take C. taking D. took 16. I tried . You lots of times but couldnt get through. A. called B. call C. to call D. calling 17. She tried .that new dress and it fitted her. She looked so beautiful in that dress. A. wear B. to wear C. wearing D. wore 18. She always helps her parents ..the housework. A. do B. is do C. doing D. did 19. You should avoid too much shorthand in formal online communication. A. use B. to use C. using D. used 20. He will fail the exam he does not study harder. A. if B. unless C. or D. when 22. Do these exercises ..you wont do the test well. A. if B. unless C. or D. when