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【題目】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】文章講述非洲沙塵暴雖然影響空氣質量,但是也帶來了一些好處,這些灰塵是南美亞馬遜熱帶雨林重要的肥料提供者。

1考查短語。句意:研究者們發(fā)現,大量的非洲灰塵能夠吹過大西洋落在北美和南美。a large amount of意為“大量的”。故這里用a。

2句意:非洲沙塵暴能夠穿過海洋影響空氣質量。聯系上句的across the Atlantic Ocean可知,這里用across。

3考查謂語動詞。句意:但是一些國家的新的研究顯示沙塵暴也有一些好處。此句主語new research,故謂語動詞用shows。

4考查形式主語。此句that引導的主語從句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,故這里用形式主語It。

5考查名詞。句意:科學家們說這些灰塵是肥料的重要提供者。根據句意可知這里用名詞provider。

6考查形容詞。句意:由于大量的灰塵和磷是很令人驚訝的。故這里用surprising。

7考查定語從句。這里構造了非限制性定語從句,用關系代詞which指代先行詞phosphorous并在非限制性定語從句中作主語,故填which。

8非限制性定語從句表示的是磷是植物成長需要的一種營養(yǎng)”,這里用不定式表示目的。故填to grow。

9考查后置定語。句意:事實上,從天空落下的磷大約和每年河流帶出的磷一樣多這里用現在分詞作后置定語,表示和邏輯主語phosphorus的主動關系,故用falling。

10考查動詞時態(tài)和語態(tài)。句意茂密的雨林和沙漠灰塵在這個小的星球上結合在一起。此處講述的是一般性情況,應用一般現在時,根據句意可知應用被動語態(tài),“被結合在一起”,故填are joined。

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