请教一道单选45.Because of the complexity of the modern machine,mos

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请教一道单选
45.Because of the complexity of the modern machine,most offices require secretaries ____.
A.to have specified training B.specified in traing?
C.to train specifiedly D.training specified?

【答案】B.【译文】由于现代机器的复杂性,多数办公室要求秘书受过特定的训练.【详细解答】require; depend on...for success 常用结构是require sb.to do sth.如：The manuscript requires an expert to understand it.这份手稿只有专家才看的懂.故可先排除C、D,而A)to train specifiedly 意思是接受特定的训练,B)to have specified training 意为有过,受过特定的训练.故B符合句意,是答案.

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