【題目】語法填空
A rainforest is an area(cover) by tall trees with the total high rainfall spreading quite equally through the year. Rainforests have a great effect on the world environment because they can take in heat from the sun and adjust the climate.the forest cover, these areas would reflect more heat into the atmosphere, (warm) the rest of the world. Losing the rainforests may also influence wind and rainfall patterns, potentially causing certain natural disasters all over the world.
In the past hundred years, humans (begin) destroying rainforests in search of three major resources: land for crops, wood for paper and other products, land for raising farm (animal). This action affects the environment as a whole. For example, a lot of carbon dioxide in the air comes from burning the rainforests. People(obvious) have a need for the resources we gain from cutting trees, we will suffer much more than we will benefit.
Rainforests are often called the world's drug store. More than 25% of the medicines we use today come from plants in rainforests. However, fewer than 1% of rainforest plants have been examined for their (medicine) value. It is extremely likely our best chance to cure diseases (lie) somewhere in the world's shrinking rainforests.

【答案】covered；Without；warming；have begun；animals；obviously；but；medical；that；lies
【解析】本文是一篇說明文，敘述了熱帶雨林在人們生活中的重要作用，它們能吸收太陽光調(diào)節(jié)地球上的溫度，減少人類得病，還能提供一些藥用的植物藥材為人類治病，因此，呼吁人們要保護(hù)熱帶雨林,進(jìn)而保護(hù)整個人類生存的環(huán)境。
（1）考查過去分詞。句意：被高樹覆蓋的地區(qū)。此處是過去分詞做后置定語，可知答案為covered。
（2）考查介詞。句意：沒有森林的覆蓋，這些區(qū)域會反射更多的熱量進(jìn)入大氣層，溫暖世界的其他地方。此空填介詞without。
（3）考查現(xiàn)在分詞。句意：沒有森林的覆蓋，這些區(qū)域會反射更多的熱量進(jìn)入大氣層，溫暖世界的其他地方。此處是現(xiàn)在分詞做自然的結(jié)果狀語，所以答案是warming。
（4）考查時態(tài)。根據(jù)“In the past hundred years,”可知句子用現(xiàn)在完成時態(tài)，主語是humans，復(fù)數(shù)形式，所以答案是have begun。
（5）考查名詞。句意：養(yǎng)農(nóng)家牲畜的土地。根據(jù)句意可知此處應(yīng)該用名詞的復(fù)數(shù)形式，答案為animals。
（6）考查副詞。副詞修飾動詞，所以答案是obviously。
（7）考查連詞。句意：人們顯然需要我們從砍伐樹木中獲得的資源，但是我們將遭受比我們受益更多。前后是轉(zhuǎn)折關(guān)系，故填but。
（8）考查形容詞。句意：醫(yī)學(xué)的價值。形容詞修飾名詞，答案為medical。
（9）考查固定句型。It is likely that...，固定句型，“很可能......”，所以答案是that。
（10）考查時態(tài)。 句意：很可能我們治愈疾病的最好機(jī)會是在世界上雨林萎縮的某處。根據(jù)句意可知句子用一般現(xiàn)在時態(tài)，主語是chance，單數(shù)第三人稱形式，所以答案是lies。

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