21. The air in many big cities has become _______________ A. peaceful B. noisy C. polluted

21. The air in many big cities has become _______________
A. peaceful                            B. noisy                        C. polluted                     D. quiet
22. They will live in __________houses in the future.
A. hi-tech                                         B. paper                        C. water                        D. ocean
23. We can reuse __________
A. water                                  B. air                            C. bottles                   D. iron
24. We shouldn’t __________rubbish on the street.
A. throw                                              B. wrap                       C. turn off                  D. take
25. Turn __________the lights when we go out.
A. on                                                 B. off                           C. of                            D. out
26. Planting more __________to reduce pollution.
A. rice                                                 B. flowers                  C. trees                       D. houses
27. Walking to school will help __________air pollution.
A. reduce                               B. reuse                         C. recycle                        D. refill
28. Which one is different?
A. running                              B. during                         C. swimming                  D. fishing
29. I think “Tom and Jerry is the best ______________      “         
A. film                                     B. sport                        C. newsreel                    D. cartoon
30. My house is ______________to the supermarket.                 
A. to the left                           B. behind                        C. near                        D. next
31. Karate is a form of martial ___________                 
A. fighting                              B. skill                              C. sports             D. arts
32. This small ___________ is used to play table tennis.           
A. racket                                 B. stick                        C. bat                          D. hoop
33. The news programme attracts millions of  __________ at 7 p.m.
A. newsreaders             B. weatherman            C. MC                          D. viewers
40. It is a good idea to __________ our clothes with our friends or cousins.
A. Change                              B. Swap                         C. Turn                         D. Send
41. If people turn off all electric appliances in one hour all over the world, they can save a lots of __________ .
A. Electric                               B. Electrical                    C. Electrician                  D. electricity
42. Don’t throw rubbish into the river because you will make it __________
A. Greener                             B. Dirty                         C. Cleaner                       D. Fresher
43. If there is a rubbish bin in every class, the classroom will become______
A. Harmful                             B. Lighter                        C. Dirtier                         D. Cleaner
44. Reduce, reuse, recycle is said to encourage people to waste less, by using
less and using things again, in order to __________ the environment.
A. Harm                                  B. Damage                      C. Pollute                        D. Protect
45. These three Rs __________ reduce, reuse and recycle.
A. Stand up                            B. Stand for                   C. Ask for                   D. Means
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