It is surprising that Jack, who is only 39 years old, _______ in the field of engineering for 20 yea

题目简介

It is surprising that Jack, who is only 39 years old, _______ in the field of engineering for 20 yea

题目详情


It is surprising that Jack, who is only 39 years old, _______ in the field of engineering for 20 years when he entered the company last month.
A.workedB.had workedC.has workedD.working
题型:单选题难度:偏易来源:不详

答案

B

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