43__________.

【名词&注释】

土壤沙漠化(soil desertification)

[单选题]43__________.

A. watch
B. notice
C. look
D. hear

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学习资料：

[单选题]30． Which is the best title for the passage?

A. The Desert Problem
B. People Make Deserts
C. Green Plants and Grass
D. The Desert，the Tree and the Water

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