◎ 题干

.People have planted a great many trees in order to _____ wind and sand in the desert.
A.hold downB.hold upC.hold backD.hold out
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◎ 解析
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◎ 知识点
    根据n多题专家分析,试题“.People have planted a great many trees in order to _____ wind and sand in the desert.A.hold downB.hold upC.hold backD.hold out…”主要考查了你对  【动词短语】【动词】  等知识点的理解和应用能力。关于这些知识点的“档案”,你可以点击相应的链接进行查看和学习。