8. When I arrived, he was trying ______ it, but there was something wrong with the engine. A. to start B. started C. starting D. start 9. Bin ________ a novel, hasn’t he? A. write B. has written C. wrote D. will write 10. If he likes the house, ________ buy it? A. would he B. will he C. did he D. does he 11. If he _______ all that, he will be ill. A. ate B. will eat C. has eaten D. eats 12. It is very important that everybody _________ very carefully. A. should listen B. to listen C. listens D. will listen 13. If her mother doesn’t drink much wine, she _________ so sick. A. won’t be B. isn’t C. doesn’t get D. wouldn’t be 14. People find the water dirty_________there are some waste chemicals in it. A. and B. as C. but D. where 15. _________you smoke too much, you’ll get respiratory problems. A. If B. Though C. As D. Because 16. If she _________ hard, she will break past records and set new ones. A. try B. will try C. tries D. tried 17. _________ it is rainy, I walk home with my umbrella. A. When B. Though C. But D. Because 18. The building was completely collapsed_________ the firefighter came. A. and B. when C. but D. so 19. _________ it got dark, the students couldn’t find the way out of the forest. A. As B. And C. When D. Unless 20. The children stopped fighting _________ their parents came back home. A. and B. when C. but D. so