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【题目】The students can ask their teachers help Internet or telephone.

A. for, by B. with, on C. with, by D. for, in

【答案】A

【解析】句意:学生可以通过互联网或电话向老师求助。考查介词辨析题。ask for help请求帮助,固定短语,可排除BC选项。by通过,表方式,可排除in。根据句意语境,可知选A。

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