Bài 1: Choose the best answer to complete each of the following sentences. 1. There three Rs.............. reduce, reuse and recycle. A. stand up B. stand for C. ask for D. means 2. If there is a rubbish bin in every class, the classroom will become .......... A. harmful B. lighter C. dirtier D. cleaner 3. "don't throw rubbish into the river because you will make it............." A. greener B. dirty C. cleaner D. fresher 4. If we use ....... paper, we will save a lot of trees. A. fewer B. less C. more D. much 5. I...... you if you need my help. A. am helping B. could help C. will help D. helped 6. If someone............ into the store, smile and say, "May I help you?" A. comes B. came C. will come D. would come. 7. If you....... all of my question, I ..... anything to help you. A. don't answer/can't do B. didn't answer/won't do C. wouldn't answer/ can't do D. wouldn't answer/ couldn't do 8. The teacher was absent today, so the class was canceled. If she..... absent again tomorrow, class...... tomorrow, too. A. is/ will cancel B. is/ will be canceled C. was/ would be canceled D. was/would cancel. 9. ........ there are some more ideas, we can end the meeting now. A. Unless B. If C. As if D. In case 10. " It's ready raining.""Yes. If the weather........., we'll have to camp somewhere else. A. would get worse B. might get worse C. gets worse D. should get worse 11. If anyone........ him I............ back at 9 o'clock. A. calls/tell/will be B. called/telling/ would be C. is calling/ tells/ am D. will call/ to tell/ am 12. If she asks for money, I.... her. A. will give B. gave C. would give D. would have given 13. If I....... this exam, I'll go to the university next summer. A. pass B. to pass C. had passed D. passed 14. If Jack refuses to help, we..... manage without him. A. have to B. will have to C. had to D. are having to 15. I cannot buy a new computer..... I save enough money. A. if B. even if C. unless D. as if 16. You will get a good seat if you... first. A. come B. came C. have come D. will come 17. We'll be late unless we... now. A. leave B. don't leave C. had left D. have left 18. We can reuse..... A. water B. air C. noise D. bottles 19. What does"reduce" mean? A. using something again B. using something more C. using something less D. collect something 20. What does "reuse" mean? A. using something again B. using something more C. using something less D. collect something 21. We shouldn't.... rubbish on the street. A. throw B. reuse C. wrap D. turn off 22. Polluted water can make fish.... A. live B. sleep C. grow D. die 23. Soil pollution can lead to lack...... food. A. for B. in C. on D. of 24. Almost 27,000 trees are cut...... every day just to make toilet paper! A. off B. down C. up D. in 25. The three Rs... reduce, reuse and recycle. A. mean by B. turn to C. stand for D. put up 26. You shouldn't throw those papers away; they're...... A. refillable B. reducible C. recyclable D. repayable 27. We should use reusable shopping bags..... plastic bags. A. instead of B. because of C. in spite D. place of 28. Thousands of people donated money and food to those in .... A. length B. need C. order D. space 29. ...... pollution can cause hearing loss. A. air B. water C. noise D. soil 30. Turn off the tap....... you brush your teeth and washing your face. A. when B. if C. because D. although 31. If more people cycle, there will be....... air pollution. A. much B. more C. less D. little 32. Which of the following cannot be recycled? A. Milk cartons B. glass bottles C. cans D. plastic bags Bài 2: Give the correct form of the word given to complete the sentences. 1. She reused her old carton boxes...... some interesting toys. (make) 2. People should try ti find some........ protecting methods to reduce current pollution. (Environment) 3. ........... is one of the main reasons causing floods and soil pollution. (Forest) 4. They encourage people to support........ products because they are friendly to the environment. (Use) 5. Police are investigating the .... of a young woman. (Disappear) 6. She tried her.... to answer all the questions of the quiz show, so she deserved to be the winner. (Good) 7. Petronas Twin Towers is one of the most famous....in Malaysia. (Architech) 8. Greenhouse gases trap........ from the sun in the atmosphere. (Hot) 9. Doing exercise more often can help you keep............. (Fitness) Các bạn giúp mik nha 5 sao luôn mik sắp đi học rồi