II: Choose the word or phrase that best completes each sentence. (2ps) 1. __________the air is cleaner, people will have less breathing problems. A. Unless B. When C. If D. Because 2. We should go to school by bike to__________the energy. A. save B. protect C. pollute D. spray 3. The people here are __________ A. friendly B. delicious C. polluted D. long 4. The town will flood if there__________a downpour. A. would be B. is C. was D. will be 5. He likes playing table tennis __________ he can’t play it. A. and B. but C. so D. or 6. We should find creative ways to reuse old items before __________ them away. A. breathing B. washing C. hearing D. Throwing 7. In the future, we won’t go on holiday to the beach but we __________ go on holiday to the moon. A. must B. can’t C. might D. won’t 8. Walking to school will help__________air pollution. A. refill B. reuse C. recycle D. reduce 9. __________walk in the rain. It’s not good for your health. A. Won’t B. Can’t C. Don’t D. Mustn’t 10. They couldn’t go on a picnic __________the weather was bad. A. because B. when C. but D. or cảm ơn mn