A person _______such kind of work must be careful enough,________ an eye on any sign of the possible

题目简介

A person _______such kind of work must be careful enough,________ an eye on any sign of the possible

题目详情

A person _______such kind of work must be careful enough,________ an eye on any sign of the  possible result .
A.to do ; to keepB.doing ; keepingC.to do ; keepingD.doing ; to keep
题型:单选题难度:偏易来源:不详

答案

B
前一空用现在分词用定语,相当一个定语从句,后一空用现在分词做状语。

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