1. I’ve ______ my glasses everywhere but I can’t find them anywhere. A. looked at B. looked after C. looked for D. looked up 2. Your shoes are dirty. You’d better ______ before you come in. A. take them off B. put them away C. put them on D. take them away 3. Everybody must take part in ______ deforestation. A. persuading B. preventing C. preserving D. providing 4. If we use too much ______ on vegetables, the vegetables will become poisonous and inedible. A. pollutant B. dynamite C. trash D. pesticide 5. Once you have filled a bag, come back to me ______ you will need another. A. so B. or C. but D. as 6. It was raining; ______, the soccer game was going on. A. and B. but C. however D. therefore 7. Mrs. Pike gives Mrs. Ha advice ______ how to save energy. A. about B. on C. for D. in 8. Throw those soda bottles over the hedge to save us ______ taking them home. A. for B. with C. from D. off 9. A: I think it would be better if we use banana leaves to wrap food. B: ______. A. Why? How come? B. Don’t worry! C. You’re great! D. Nonsense! 10. If people stop using dynamite to fish, a lot of sea creatures will be well ______. A. preserve B. preservation C. preserved D. preservative 11.His hobbies are playing soccer ______ collecting stamps. A. and B. but C. however D. although 12.I’d love to play volleyball ______ I must complete my homework. A. since B. moreover C. but D. and 13.Scientists are looking for an ______ way to reduce energy consumption. A. effect B. affection C. effective D. effectively 14. What can we do to spend less ______lighting? A. in B. on C. about D. of