giúp em với ( phần 3) ----- Nội dung dịch tự động từ ảnh ----- 17. You will catch a cold if you ........... A. aren't B. won't Unit 11: Our Greener World 127 ..... keep your feet dry. C. not D. don't 18. You shouldn't throw rubbish into ................. street A. a B.O 19. If we use fewer cars, we will......... A. reduce B. reduces 20. How clean is. A. Ø B. an C. the pollution. D. an C. reducing D. reduced ............ air people breathe? C. a D. the Exercise 8. Underline the mistakes and correct them. 1. I usually play guitar in the evening. 2. What a terrible weather! 3. If you don't be quiet, her baby will wake up. 4. I have a parrot. A parrot is colourful. 5. You don't pass the exam if you don't study hard. 6. If you will help me, I will finish my project on time. 7. Hai is intelligent student. 8. We go to movies twice a month. 9. Recycle more or our planet will be better. 10. Most popular recycled materials are glass, paper, plastic, andaluminum..