1. I suggest ................................ the lights and the fans after leaving the classroom. A. turn off B. turning on C. turning off D. should turn off 2. Why don't you ......................... TV when you get out of your rooom? A. turn on B. turn off C. turning off D. turning on 3. I think we ............................... a shower instead of a bath to save energy. A. take B. took C. taking D. should take 4. How about ......................... posters on energy saving and ................... them around our school?. A. make / hang B. made / hung C. making / hunging D. making / hanging 5. Let's ................... to school by bike instead of motorbkie to save energy. A. go B. went C. gone D. going 9.6. Shall we ..................... a separate wastebasket for wastepaper. A have B. having C. had D. should have 7. I suggest we .............................. sheets with single printed page for drafting. A. keep B. keeping C. should keep D. shoul kept 8. Why don't you ....................... the lights. It's too dark. A. turn off B. turn on C. turning on D. turning off 9. What about .................... different kinds of waste in different places? A. to put B. putting C. should put D. puting 10. I suggest ...................... food careffully before turning on the stove to save energy. A. prepare B. prepared C. preparing D. should prepare 11. Nam got wet ......................... he forgot his umbrella. A. so B. and C. or D. because 12. Na is very tired. ................................., she has to finish her homework before she goes to bed. A. But B. So C. However D. Therefore 13. It's raining, ........................ we can't go to the beach this afternoon. A. and B. or C. so D. therefore 14. Hoa failed her math test. ................................. , she has to do the test again. A. And B. So C. Therefore D.However 15. Hanh can't go to the movies with us tonight. She will have to ........................ her little sister. A. go on B. turn on C. look for D. look after 16. I've lost my new pen. I've ................ it everywhere and I can't find it anywhere. A. look for B. looked for C. look after D. turned on 17. Mrs Yen forgot to ......................... the faucet when she left for work. A. turn on B. turn off C. go on D. look after 18. If we ......................... wasting water, there will be a shortage of fresh water in a few decades. A. turn on B. look for C. look after D. go on 19. ........................ TV for me, will you? I want to watch the weather forecast. A. turn on B. turn off C. switch off D. keep on 20. I suggest we ........................... a show to raise money for covid-19 victims. A. organize B. organizing C. organized D. should organize