精选优质文档-倾情为你奉上2020年高考英语语法填空专项训练八篇（二）（一）Researchers find that _1_ large amount of African dust can blow all the way across the Atlantic Ocean and fall on North and South America.African dust storms can harm air quality _2_ the ocean.But new research by scientists from some countries _3_ (show) the storms also can do some good._4_ is found that an average of 28 million metric tons of Saharan dust falls in South Americas Amazon River basin each year.Scientists say the dust is an
