9.on the road to:在去的旅途中
10.Phase out:分阶段结束
11.for good:永久地;决定性地
练习:
1. Why does the risk of developing skin cancers in children become greater and greater?
A Because they pay little attention to their skin health.
B Because they are short of physical training.
C Because the earths protective ozone layer declines year after year.
D Because the earth is getting warmer and warmer.
2. How many people die from skin cancers including melanoma all over the world every year?
A An average of 66,000.
B Approximately 130,000.
C About 196,000.
D Between 2,000,000 to 3,000,000.
3. What people are more likely to develop eye cataracts?
A Fairer-skinned people.
B Darker-skinned people.
C People living near the equator.
D People living near the poles.
4. All of the following articles may use some chemicals unfavorable for the preservation of the ozone layer EXCEPT______.
A aerosols
B refrigerators
C pesticides
D medicines
5. The phrase for good in the last paragraph can be best replaced by______.
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