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Humankind’s future safety and longevity of life on Earth largely depend on the environment which we live. Keeping the air we __1__ breathe free of pollution is a major priority towards making this earth a safe place. Other areas of concern are water, land, the ozone layer, and the preservation of flora and fauna of the planet.
Every country has ecological issues to deal. In South America, __2__ the rain forests are rapidly disappearing as people burn and cut down trees to make for farmland. Many Middle-Eastern and Asian countries __3__ have a battle to fight with air, water, and land pollution. Lakes and swamps are spread with debris. __4__ Mass chemical spraying is used to kill pests on trees and plants. Abundant __5__ use of water in countries as China has caused major water shortage. __6__ Rivers become polluted by factories and the populations that live on their banks. Global warming is considered a major factor caused __7__ the droughts in eastern China, the Sudan, Ethiopia, and northern Kenya.
The reduction of the ozone layer is blamed for the global warming trends in variant countries of this globe, and the spread of disease like skin __8__ cancer. Societies at large need to pay attention to the existing problems in order to get of the imminent danger of famine, drought and diseases __9__ that rise from the damage that pollution causes. __10__
參考答案及解析：
1.^which-in 此處的介詞其實是和live連用的，live in the environment。
^-with。deal with是固定搭配，意思是“解決，處理”。
^-way。根據上下文可以斷定此處文章要說的是“人們燒，伐樹木爲的'是給開墾農田讓路。”make way for something。是“給……讓路”，符合此處需要的意思。
ad-polluted/littered。這裏的關鍵是要知道debris的意思是“碎片，殘骸等”，所以根據上下文這裏的意思是“湖泊和溼地被一些碎片殘骸所污染或弄得凌亂不堪”才符合邏輯。
5.^Abundan-the。此處不是泛指，而是特指，所以要有定冠詞。
-like。此處是拿中國舉例，所以要用介詞like“像……一樣”。
e-causing。此處定於分句是主動的意義。
ant改爲various。variant是“變體的，變種的”，而various表示“不同的”，符合此處意思。
^of-rid。固定搭配get rid of 是“擺脫”的意思。
-arise
