Read and choose the word or phrase marked A, B, C or D that best fits the blank space

mng giup minh voi a
----- Nội dung ảnh -----
III. READING
A. Read and choose the word or phrase marked A, B, C or D that best fits the blank space.
31. A. noise
32. A. action
33. A. form
34. A. consisting
35. A. containing
36. A. crease
37. A. resident
38. A. relaxed
39. A. frequent
40. A. produce

B. Today, I'd like to begin a discussion on the relationship between fluorocarbons and the ozone layer. The protective shield around the Earth. It's important to realize that ozone itself, a form of oxygen, is regularly destroyed by these vehicles. Scientists suspect that the system of the heating up of the Earth...