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题型:语法填空-短文语填 难度:0.65 引用次数:67 题号:14733224
阅读下面短文, 在空白处填入1个适当的单词或括号内单词的正确形式。

Around       1     earth, there is a thin layer of ozone(臭氧), a kind of gas protecting us from any of the harmful rays of the sun. A few years ago, scientists in the Antarctic became aware     2     holes growing in the ozone layer. As these holes get bigger, harmful rays from the sun are     3     (increasing) reaching us,     4    (cause) crop damage and cancer. This is a big problem in countries near the polar regions, like Australia     5     skin cancer caused in part by ozone depletion (消耗)is now considered a national epidemic(流行病).

Further research into the problem showed that the ozone layer is being destroyed by gases called CFCs. These gases     6     (release) into the atmosphere by the chemicals used in aerosol cans, refrigerators and air conditioners. To help save the ozone layer, many     7     (manufacturer) have stopped producing aerosol cans that use CFCs. They have switched to other less harmful chemicals, and labeled     8     (they) cans “ozone-friendly” or “no CFCs”.

The problem of refrigerators and air conditioners has been more difficult     9     (solve). However, more and more manufacturers are now producing refrigerators and air conditioners     10     do not use CFCs. Therefore, when you go shopping you should choose ozone-friendly products. Then you will be doing something to help the environment.

【知识点】 科普知识 环境保护

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