【题目】Anne couldn’t concentrate ______what she was doing while her friends were playing cards.
A. to B. on
C. for D. in
在线课程【答案】B
【解析】
试题分析：concentrate on sth./ doing sth.为固定搭配，“专心致志于(做)某事”。
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Anne couldn’t concentrate what she was doing while her friends were playing cards.A. to B. onC. for
编辑：chaxungu时间：2026-04-27 03:02:51分类：高中英语题库
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