làm và kèm giải thích (50 điểm) 1. On the way home, Long often stops ………………… a newspaper. (buy) 2. Energy-saving bulbs are used ……………… electricity in the USA. (save) 3. It is very possible ………………… solar energy for a number of days. (store) 4. The best way to reduce garbage is ……………… and recycling things. (reuse) 5. Poisonous gases …………………. into the atmosphere every day. (pump) 6. Solar panels ……………………. on the roof of a house. (place) 7. How about …………………… used paper, bottles and cans every day ? (recycle) 8. I’m not used to ………………. so far, so I must stop ……………… for a while. (walk / stop) 9. His joke made me ………………. a lot. (laugh) 10. If we use energy-saving bulbs, we ………………… a lot of money. (save) 11. They ……………………. roses in the garden when I came to see them. (plant) 12. Thank you for ……………………….. after my grandpa while I was away last week. (look) 13. Young people are keen on …………………… fashionable clothes. (wear) 14. They ……………………. TV all evening yesterday. (watch) 15. I …………………….. table tennis for three years now. (play) 16. If you ……………….. the lesson, I’ll explain it again to you. (not understand) 17. If the rice paddies …………………., the rice plants ………………… (pollute / die) 18. John ………………… the first prize in the English speaking contest. (just / win) 19. I think we …………………… some canned food before typhoon. (buy) 20. I suggest …………………… solar energy instead of coal, gas and oil. (use) 21. Why not ………………… another products ? (choose)