Computers in offices and homes since 1970s．
A. have been used
B. had been used
C. was
D. has been used
Computersin offices and homes since 1970sA. have been usedB. had been usedC. was D. has b
答案:2 悬赏:20 手机版
解决时间 2021-12-19 14:55
- 提问者网友：我没有何以琛的痴心不悔
- 2021-12-18 21:16
最佳答案
- 五星知识达人网友：空山清雨
- 2021-12-18 21:49
(答案→)A. have been usedB. had been usedC. was D. has been used解析：考查时态和语态。从时间状语since 1970s要使用现在完成时，且computers与use之间为被动关系，故选A。句意：自20世纪70年代以来，电脑已经在家庭和办公室使用。
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- 1楼网友：想偏头吻你
- 2021-12-18 23:06
这个答案应该是对的
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