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【题目】Researchers find that1large amount of African dust can blow all the way across the Atlantic Ocean and fall on North and South Americas.

African dust storms can harm air quality2 the ocean. But new research by scientists from some countries 3 (show) the storms also can do some good. 4is found that an average of 28 million metric tons of Saharan dust falls in South America’s Amazon River basin each year. Scientists say the dust is an important5(provide) of fertilizer. “Yes, it’s6(surprise) because of the huge amount of dust and phosphorous(), 7 is a nutrient that plants need8(grow),” one of them says.

In fact, the phosphorous9(fall) from the sky is about the same as the amount that rivers carry out each year. The thick rainforest and the desert dust 10(join) together on one small planet.

【答案】

1a

2across

3shows

4It

5provider

6surprising

7which

8to grow

9falling

10are joined

【解析】文章讲述非洲沙尘暴虽然影响空气质量,但是也带来了一些好处,这些灰尘是南美亚马逊热带雨林重要的肥料提供者。

1考查短语。句意:研究者们发现,大量的非洲灰尘能够吹过大西洋落在北美和南美。a large amount of意为“大量的”。故这里用a。

2句意:非洲沙尘暴能够穿过海洋影响空气质量联系上句的across the Atlantic Ocean可知,这里用across。

3考查谓语动词。句意:但是一些国家的新的研究显示沙尘暴也有一些好处。此句主语new research,故谓语动词用shows。

4考查形式主语。此句that引导的主语从句that an average of 28 million metric tons of Saharan dust falls in South America’s Amazon River basin each year.放在后面,故这里用形式主语It。

5考查名词。句意:科学家们说这些灰尘是肥料的重要提供者。根据句意可知这里用名词provider。

6考查形容词。句意:由于大量的灰尘和磷是很令人惊讶的。故这里用surprising。

7考查定语从句这里构造了非限制性定语从句,用关系代词which指代先行词phosphorous并在非限制性定语从句中作主语,故填which。

8非限制性定语从句表示的是磷是植物成长需要的一种营养”,这里用不定式表示目的故填to grow。

9考查后置定语。句意:事实上,从天空落下的磷大约和每年河流带出的磷一样多这里用现在分词作后置定语,表示和逻辑主语phosphorus的主动关系,故用falling。

10考查动词时态和语态。句意茂密的雨林和沙漠灰尘在这个小的星球上结合在一起。此处讲述的是一般性情况,应用一般现在时,根据句意可知应用被动语态,“被结合在一起”,故填are joined。

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