31.A
32.B

33.A

34.B

35.B

36.B

37.D

38.D

39.B

40.A

41.D

42.B

43.C

44.b

45.C

31. Next week our class is having a discussion about finding __________ ways to reuse old items before throwing them away.
A. Interested    B. Surprising   C. Useless    D. Creative
32. It is a good idea to __________ our clothes with our friends or cousins.
A. Change    B. Swap   C. Turn   D. Send
33. 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
34. You should put the food in a reusable box __________ plastic bags.
A. By     B. Instead of   C.Because of  D.Without
35. If we use __________ paper, we will save a lot of trees.
A. Fewer    B. Less  C. More   D.Much
36. Don’t throw rubbish into the river because you will make it __________.
A. Greener    B. Dirty   C. Cleaner   D. Fresher
37. If there is a rubbish bin in every class, the classroom will become______
A. Harmful    B. Lighter   C. Dirtier   D. Cleaner
38. If we all use__________ bags, we will help the environment.
A. New    B. Cheap   C. Reusable   D. Reduced
39. This newspaper is made of __________ paper.
A. Recycle    B. Recycled   C. Old   D. Waste
40. Please collect all the recyclable materials, and take them to the __________ factory.
A. Recycle    B. Recycled   C. Recyclable  D. Recycling
41. 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
42. These three Rs __________ reduce, reuse and recycle.
A. Stand up    B. Stand for   C. Ask for   D. Means
43. If you have old clothes, will you give them to those __________?
A. Needs    B. To need   C.For needing  D.In need.
44. It’s very …………… to swim there. The water is healthy polluted
A. safe          B. unsafe                              C. unpopular                  D. exciting 
 45.  Many girls and women …… aerobics to keep fit.
  A. play                              B. go                                 C. do                   D.have