【題目】The second unit of this book campus life.

A. focuses atB. focuses onC. focuses toD. focuses with

【答案】B

【解析】

句意“這本書的第二單元集中講述校園生活”。

focus集中；focus at沒有此用法；focus on集中于；focus to do為了做某事需要專注；focus with專注于。根據(jù)句意可知，譯為“集中講述校園生活”，故選B。

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