Question

【题目】The computer _____ in offices and homes since the 1970s.

A. has used B. has been used

C. had used D. had been used

Answer 1

【答案】B

【解析】B考查时态。句意：自上世纪70年代以来，计算机就一直被用于办公室和家庭。由时间状语since the 1970s可知用现在完成时态；计算机是被应用的，用被动语态，故选B。