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        1. 【題目】The atmosphere gets thinner and thinner ________ the height increases.

          A. while B. since C. as D. for

          【答案】C

          【解析】

          考查連詞辨析。句意:隨著高度的增加,大氣變得越來越稀薄。A. while當……時;B. since自從……以來;C. as隨著……;D. for因為。這里表示伴隨,故C選項正確。

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