After several days of social activities, I decided to _ on my research on the human behaviors.A．fixB．settleC．setD．concentrate-高中英语-n多题

◎ 题干

After several days of social activities, I decided to _ on my research on the human behaviors.

A．fix

B．settle

C．set

D．concentrate

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◎ 解析

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◎ 知识点

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