Computers in offices and homes since 1970s．
#101154
A
have been used
B
had been used
C
was
D
has been used
推荐题目
Many accidents________ by careless drivers last year.
#100142
A
are caused
B
were caused
C
have caused
D
will cause
Whatever they end up doing, they __themselves a great deal.
#102595
A
will be teaching
B
will have taught
C
are teaching
D
will be taught
Around two o’clock every night，Sue will start talking in her dream.It somewhat________us. (2013·湖南，24)
#99431
A
bothers
B
had bothered
C
would bother
D
bothered
If you have a job, yourself to it and you’ll succeed.
#101930
A
don’t devote
B
do devote
C
devoting
D
not devote
By the time Jack returned home from England, his son. from college.
#102659
A
graduated
B
has graduated
C
had been
D
had graduated