[单选题]30. Which is the best title for the passage?
正确答案 :A
The Desert Problem
解析:30.A【解析】作者在文章中叙说和阐明的观点与问题是地球土壤沙漠化的问题。故选A。
[单选题]ALight and shadow are friends. They usually go together. We receive light every day. At the same time,we produce shadow.
正确答案 :I
They are always together,when we get light,we can get shadow.
解析:21.D【解析】由文章最后一句可知光和影子是同时存在的。
[单选题]贵港素有“荷城”之称,每年夏天在荷塘边都会闻到荷花的香味,这一现象说明( )
正确答案 :A
分子在不断运动 B.分子很小
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