Question

Read the following passage and mark the letter A, B, C or D on your answer sheet to indicate the correct answer to each of the questions.

           Today I’d like to begin a discussion on the problem of the heating up the earth. First, we’ll touch on the relationship between fluorocarbons and the ozone layer. You probably remember that the ozone layer is the protective shield around the earth. It is important to all life, because it filters out harmful ultraviolet light from the sun. Ozone itself, a form of oxygen, is regularly made by the action of the sun in the upper atmosphere. It is also regularly destroyed by natural chemical processes.

            The problem now is that too much of the ozone layer is being destroyed. Scientists suspect that certain chemicals, such as fluorocarbons, are contributing to the depletion of the ozone layer. And how do we use fluorocarbons? The most common uses are in spray cans and cooling systems. The chemical pollution from these fluorocarbons can account for some of the ozone losses that have been reported. There are, however, new studies linking the sun itself to the depletion of the ozone layer. We’ll go into that new study more next time.

What will the speaker probably discuss next?

A. The make-up of the ozone layer.

B. The sun as a cause of ozone layer depletion.

C. How to make air conditioners with fluorocarbons.

D. Harmful effects of ultraviolet light.

Answer 1

Đáp án B

Diễn giả có khả năng sẽ tiếp tục bàn về vấn đề nào?

A. Cấu tạo tầng ozone.

B. Mặt trời – tác nhân gây hao tổn tầng ozone.

C. Cách sản xuất điều hoà với floruacacbon.

D. Tác động có hại của tia cực tím.

2 câu cuối bài: “There are, however, new studies linking the sun itself to the depletion of the ozone layer. We’ll go into that new study more next time.”

(Tuy nhiên, đã có nghiên cứu liên hệ mặt trời với sự hao tổn của tầng ozone. Chúng ta sẽ đi sâu vào nghiên cứu mới này vào lần sau)

Như vậy tác giả sẽ tiếp tục bàn về mặt trời – tác nhân gây hao tổn tầng ozone.