核心问题
It is good manners for an Arab to stand close to his friend when they are talking. close to 是什么词？其中的 to 能否省略？
词典解答
close to 如同 next to 一样, 叫做复合介词 (the complex preposition), 其中的 to 是不能省略的。单独的 close 不能充当介词, 只能充当动词、形容词和副词。
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She sat close to me. 她靠近我坐着。
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There is a bus-stop close to the school. 学校附近有一个公共汽车站。
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You are too close to the fire. 你离火炉太近了。
He held the newspaper ____ his eyes, but still he couldn't see it clearly. A. close B. close to C. closed D. closely to