【正文】 ? write five or six paragraphs。 because 7. You’ll be late for school ____you don’t hurry. A. so B. if C. after D. although 8. If I ______ free, I’ll see you tomorrow. A. am B. will be C. was D. / 9. Do you know if he ______ tomorrow? A. came B. es C. will e D. / 10. He works harder than ___in his class. A. all the students B. all the boys C. any other student D. other students 11. You will fall behind others _____ you don’t work hard. A. when B. if C. though D. because 12. Although Peter is clever, ____work hard. A. he doesn’t B. he isn’t C. but he doesn’t D. but he isn’t 13. Tom had a headache, _____ he didn’t go to the party. A. why B. so C. but D. or 14. _____ he was doing his homework, the telephone rang. A. Because B. If C. While D. But 15. You will stay healthy ____ you do more exercise, such as running and walking. A. if B. how C. before D. where 16. Shall we go on working? Yes, ____I prefer to have a rest. A. when B. if C. because D. though 17. None of us knew what had happened _____they told us about it. A. when B. until C. after D. though 18. I was late for class yesterday ______ there was something wrong with my bike. A. when B. that C. until D. because 19. I’ll go swimming with you if I ______free tomorrow. A. will be B. shall be C. am D. was 20. You should finish your lessons ______you go out to play. A. before B. after C. when D. while Paraphrase the following sentences some sports, and you’ll be healthy. you study hard , you will catch up with your classmates. If you do some sports, you will be healthy. Study hard, or you’ll fall behind classmates. 3. Fish will die without water. 4. Don’t stay up late, or you’ll be sleepy tomorrow. Fish will die if there is no water. A3 Complete these sentences with the words in brackets. Add mas where necessary. 1 If you __heat_______ ice__it turns into_______ water. (turns/heat/it/into) 2 A balloon _bursts if you stick a pin into ________ it. (pin/a/if/stick/you/bursts/into) 3 If you cool_________ steam it turns into_________ water. (into/cool/turns/it) 4 Metal melts if you heat _________ it. (you/ heat/melts/if) 5 Wood floats if you put it into _________ water. (you/into/put/if/floats/it) 6 A glass breaks if you drop_________ it. (drop/you/breaks/if) B1 William’s sister is giving him advice about some of his problems. Choose the correct halfsentences from each box, and plete her advice for William’s problems below. If you write a shopping list, you will remember to get all the things. 1. I sometimes fet to take the right books to school. If you check your timetable every night, you will know which books to take. 2. I was away from school today. I don’t know what to do for homework. If you telephone your friends, they will tell you what homework to do. 3. I sometimes fet which things to buy at the supermarket. If you write a shopping list, you will remember to get all the things. 4. I hate getting up! I always feel tired in the mornings. If you go to bed earlier, you won’t feel tired in the mornings. 5. I don’t know what this word means. If you look it up in the