【題目】A rainforest is an area 【1】(cover) by tall trees with the total high rainfall spreading quite equally through the year. Rainforests have a great effect 【2】the world environment because they can take in heat from the sun and adjust the climate. Without the forest cover, these areas would reflect 【3】(much) heat into the atmosphere, warming the rest of the world. Losing the rainforests may also influence wind and rainfall patterns, potentially【4】(cause) certain natural disasters all over the world.

In the past hundred years, 【5】(human) have begun destroying rainforests in search of the three major resources: land for crops, wood for paper and other products, land for raising farm animals, 【6】affects the environment as a whole. For example, a lot of carbon dioxide in the air comes from burning the rainforests. People 【7】 (obvious) have a need for the resources from cutting trees 【8】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【9】 (medicine) value. It is extremely likely that our best chance to cure diseases 【10】(lie) somewhere in the world’s shrinking rainforests.

【答案】

【1】covered

【2】on

【3】more

【4】causing

【5】humans

【6】which

【7】obviously

【8】but

【9】medical

【10】lies

【解析】本文主要介紹了雨林對(duì)于人類的重要作用。

【1】考查過去分詞。過去分詞covered作定語，修飾名詞area，與之是被動(dòng)關(guān)系，故填covered。

【2】考查介詞。固定短語：have an effect on（對(duì)……有影響），故填on。

【3】考查形容詞。句意：如果沒有森林覆蓋，這些地區(qū)將把更多的熱量反射到大氣中，使世界其他地區(qū)變暖。根據(jù)句意，應(yīng)該用much的比較級(jí)，故填more。

【4】考查現(xiàn)在分詞�，F(xiàn)在分詞causing作結(jié)果狀語，與這句話的主語是主動(dòng)關(guān)系，故填causing。

【5】考查名詞。名詞human（人、人類）作主語，謂語動(dòng)詞是have，所以主語名詞要用復(fù)數(shù)形式，表泛指，故填humans。

【6】考查關(guān)系代詞。非限制性定語從句，用關(guān)系代詞which引導(dǎo)，在從句中作主語，代替前邊整個(gè)句子，故填which。

【7】考查副詞。副詞obviously（明顯地）作狀語，修飾謂語動(dòng)詞have，故填obviously。

【8】考查連詞。句意：人們顯然需要砍伐樹木所需的資源，但是我們將遭受比我們所能得到的更多的損失。用表轉(zhuǎn)折的連詞but連接前后兩個(gè)句，故填but。

【9】考查形容詞。形容詞medical（醫(yī)學(xué)的）作定語，修飾名詞value，故填medical。

【10】考查動(dòng)詞。謂語動(dòng)詞lies，主語是名詞chance，是單數(shù)形式，說的是一般狀況，所以要用一般現(xiàn)在時(shí)態(tài)，故填lies。

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