Student have to economize by _____________________ all the lights and fans before leaving their rooms.
A.Turning on B.looking for C.going on D.turning off
1. A. method B. death C. think D. those
2. A. nature B. natural C. explain D. nation
3. A. ocean B. beach C. clean D. reason
4. A. climb B. surburb C. comb D. doubt
5. A. treasure B. reasure C. measure D. pleasure
6. A. walked B. filled C. died D. played
7. A. occupy B. puppy C. study D. ready
8. A. name B. natural C. nation D. native
9. A. about B. count C. wounded D. shout
10. A. suit B. build C. guilty D. guitar
11. A. compare B. area C. many D. stamp
12. A. model B. solid C. solar D. profitable
13. A. bulb B. consumer C. plumber D. luxury
14. A. chopstick B. scheme C. champagne D. chair
15. A. recent B. efficient C. faucet D. receive