He felt he needed to focus more ________ his study.

2024-11-05 19:58:42
英语（高升专）(c0003)

He felt he needed to focus more ________ his study.
A、on
B、in
C、over
D、at
【正确答案】：A
【题目解析】：focus on 固定搭配，集中

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