1. The students suggested....................the posters on energy saving. ( a. make     b. to make    c. making )
 2. His hobbies are reading comics.................playing video games. ( a. or        b. and        c. but )
 3. She is .................that her English speaking is becoming better. ( a. pleased    b. worried    c. sure )
 4. What are you doing, Lan? – I’m looking...................my keys. ( a. after    b. for        c. at )
 5. I suggest that we...........English regularly in class. ( a. speaking       b. must speak     c. should speak )
 6. People can save natural resources by using....................energy. ( a. sunny    b. solar        c. sun )
 7. They didn’t go to the circus...........the tickets were too expensive. ( a. because    b. as           c. a & b are OK)
 8. If she................him at the club, she will give him a present. ( a. will see    b. sees           c. doesn’t see )
 9. What do we do to reduce air.................................in the city    ( a. pollution    b . polluting    c. polluted )
 10. She is looking forward..........................her parents at Christmas     (  a. to meet    b. meeting    c. to meeting )
 11. Solar panels are installed on the roof of a house.................the energy from the sun.
 ( a. to receive        b. receive    c. receiving        d. to get )
 12. It is very dark here. Could you turn..........................the lights? ( a. off        b. on        c. down )
 13. The sun can be an..................and clean source of power. ( a. effect    b. effective    c. effectively )
 14. If we go on.......water, we will be a shortage of water in a few decades. ( a. wasting    b. to waste    c. waste )
 15. There is a .....................................faucet in the bathroom. ( a. drip    b. dripping    c. to drip )
 16. I want to see the..................of the environment from the local authorities.
 ( a. protect        b. protection        c. protective )
 17. I think we should save our ...........................resources. ( a. natural    b. nature    c. naturally )
 18. We should use...........bulbs instead of ordinary bulbs. ( a. saving- energy       b. energy- saving       c. saving )
 19. He isn’t very rich..............he spends a lot of money helping the poor. ( a. but       b. and    c. so )
 20. We should be aware of the problem of.................( a. polluting        b. polluted    c. pollution )
 21. They are delighted that the water here is.....................    ( a. polluted        b. unpolluted    c. pollute )
 22. Most of the consumers want products working..............    ( a. effective        b. effect    c. effectively )
 23. What can we do to spend less.............................lighting? ( a. on        b. for        c. in )
 24. She often looks.............her brother when her parents are away   ( a. for        b. after    c. like )
 25. If Nam.......................his homework, he will go with us. ( a. finishes        b. will finish    c. finish )
 26.She was ..................because she couldn’t pass her exam. ( a. happy    b. unhappy    c. unhappily )
 27. They had to stay at home.................it rained heavily. ( a. so        b. but        c. since )
 28. Everyone must take part in................deforestation. ( a. preventing        b. reducing    c. protecting )
 29. I’m............that my school team didn’t win the first prize      ( a. sure        b. delighted          c. disappointed )
 30. Electricity, gas, water are very..........for our life. ( a. necessary       b. necessity           c. unnecessary )
 31. Solar energy can be clean and it doesn’t cause.................( a. polluted       b. pollution           c. polluting )
 32. We are looking forward ....................from the local authorities. ( a. to hear    b. hear        c. to hearing )
 33. She suggests that you ..........................them to the party  ( a. should invite    b. must invite    c. will invite )
 34. We went.....................working in the field although it was too dark. ( a. to    b. on        c. into )
 35.He wanted to watch the weather forecast, so he turned.......................the TV. ( a. on    b. down    c. off )
 36. She didn’t go with us because she had to look.................my sister. ( a. for        b. after   c. up )
 37. I suggest........................the garden early in the morning. ( a. watering    b. to water    c. should water )
 38. There are ten years in a............................., aren’t there? ( a. century    b. decade    c. millennium )
 39.They suggest that we..................money for our poor friends. ( a. saving    b. must save    c. should save )
 40. Can you turn.................the radio, please? I can’t hear anything. ( a. down    b. on        c. in to )
 41. Does she live in the city............................in the country? ( a. or        b. and        c. but )
 42. He has an...............amount of money after winning the lottery    ( a. enormous    b. much    c. many )
 43. Where do you want the telephone to be................? ( a. install    b. stored    c. installed )
 44. I’m worried about my most recent..........bill. It is enormous.( a. electricity    b. electric     c. electrical )
 45. There is a..........................faucet in the bathroom. ( a. drip    b. dripping    c. dripped )
 46. Lighting accounts ..................15 percent to 20 percent of the electricity bill.
 ( a. to        b. of        c. for )
 47. All buildings in Sweden .................by solar energy in 2015 ( a. will be heated           b. will heat    c. heats )
 48. We think we should take a shower instead of a bath ...................energy. ( a. save    b. saving    c. to save )
 49. He has been looking ....................his missing child for many years. ( a. for    b. after        c. like )
 50. The vacation was short; .................., they enjoyed it very much. ( a. but    b. however    c. so )