_________ is a growing world problem, and nowadays the United Nations and its me
题型：不详难度：来源：
_________ is a growing world problem, and nowadays the United Nations and its member countries _________hard to deal with it．| A．Desertification; are working | B．Desertified ; worked | | C．Desert; work | D．Desertification; have worked |
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答案
| A |
解析
第一空填：Desertification“沙漠化”，第二空考时态：句意是：沙漠化是日益严重的世界问题，现在联合国和成员国正努力对付它。用现在进行时，选A。 |
举一反三
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