At school, some students are active some are shy, yet they can be friends with one another.A. whileB

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【题目】At school, some students are active ________ some are shy, yet they can be friends with one another.

A. whileB. althoughC. since

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【答案】A

【解析】

试题分析：句意：在学校，一些学生是积极的，而一些是害羞的，但是他们也可以互相成为朋友。此处表示对比，故选A。