【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(dāng)……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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