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阅读下面材料,在空白处填入1个适当单词或括号内单词的正确形式。 They had...

阅读下面材料,在空白处填入1个适当单词或括号内单词的正确形式。

They had been on 1. (we)planets for millions of yearsbut 2018 was the year several species 2. (official)died off for ever.Three bird species went extinct this yeartwo of 3.are songbirds from northeastern Brazil.A 4. (disturb)trend is that mainland species are starting to go extinctrather than island species.

The species 5. (wipe)out in the wild resulted from many factors such as the creation of dam and trapping  6. trade.Beyond birdsother animals such as the vaquita and the northern white rhino 7. (be)near the end.We are currently experiencing the worst species dieoffs since the 8. (1ose)of the dinosaurs 65 million years ago.

Although extinction is a 9. (nature)phenomenonit occurs at a rate of about one to five species per year.Scientists estimate were now losing species at 1000 to 10000 times the rate.In the past 500 yearsabout 1000 species 10. (go)extinct.

 

1. our 2. officially 3. which 4. disturbing 5. wiped 6. for 7. are 8. loss 9. natural 10. have gone 【解析】 本文是一篇记叙文。文章讲述导致物种灭绝的因素。 1.考查形容词性物主代词。句意:他们一直在我们的行星里数百万年,但2018年几个物种正式相继死亡。形容词性物主代词修饰名词,故答案为our。 2.考查副词。句意:他们一直在我们的行星里数百万年,但2018年几个物种正式相继死亡。副词修饰动词,故答案为officially。 3.考查定语从句。句意:今年三种鸟类灭绝,其中两个是巴西东北部的鸣禽。此处species做先行词,指物,在介词of后面用which(指物)引导定语从句,故答案为which。 4.考查形容词。句意:一个令人不安的趋势是大陆物种开始灭绝,而不是岛上的物种。此处用形容词修饰名词,故答案为disturbing。 5.考查过去分词作后置定语。句意:该物种在自然环境下被灭绝是由许多因素造成的,如大坝的建立和贸易陷阱。此处The species 和wipe之间是一种被动关系,是过去分词做后置定语,故答案为wiped。 6.考查固定词组。句意:该物种在自然环境下被灭绝是由许多因素造成的,如大坝的建立和贸易陷阱。trap for trade贸易陷阱。故答案为for. 7.考查时态和主谓一致。句意:除了鸟,其他动物如vaquita和北部白犀牛也即将灭绝。此处指现在的情况,句子用一般现在时态,且主语是animals,复数形式,故答案为are。 8.考查名词。句意:我们正在经历自6500万年前恐龙灭绝以来最严重的物种灭绝。根据the可知此处用名词形式,故答案为loss。 9.考查形容词。句意:尽管灭绝是一种自然现象,但它发生的速度每年一至五种。此处phenomenon是名词,形容词修饰名词,故答案为natural。 10.考查现在完成时态。句意:在过去的500年里,大约1000个物种已经灭绝了。根据In the past 500 years可知句子用现在完成时态,故答案为have gone。
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