Fill in each blank with ONE correct word.
31.................s the act of cutting down or burning the trees in an area.
32...........is the act of using rubbish to remake new things that can be sold again.
33. We should turn off all the lights and fans before we...........the classroom.
34. If we breathe ..........air, we will have breathing problems.
35. You can take these bottles to the factory to.............them.
36. If we turn off the lights when we are not using them, we will save a lot of...............
37. If we recycle old newspapers, we will............a lot of trees.
38. If we walk or cycle to school, we will improve our health and.........air pollution.
39. Recycling starts when we put rubbish such as empty bottles and cans in the recycling............
40. When you go to the supermarket, you should...........before you buy in order not to buy things you don't need later.
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Sinh Học lớp 12
