Question

【题目】We have saved much time and money since the new machines ________ to our factory.

A.are broughtB.were broughtC.bringD.brought

Answer 1

【答案】B

【解析】

考查一般过去时的被动语态。句意为：自从这些新机器被带到我们厂,我们节约了很多时间和成本。machines与bring是动宾关系,所以用被动语态；since引导的时间状语从句,主句用现在完成时,从句用一般过去时。故选B。