题目内容

【题目】The manager said to the employees at the meeting that everyone must___their attention to efficiency

A.concertrate

B.focus

C.pay

D.fix

【答案】C

【解析】句意:在大会上,经理对职员说,每个人都必须把注意力集中在效率上。根据后面的介词to可知答案。concentrate ,focusfix后面的介词都用onupon

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