Computers in offices and homes since 1970s．
#99298
A
was
B
had been used
C
have been used
D
has been used
推荐题目
George said that he would come to school to see me the next day, but he ______.
#102153
A
wouldn't
B
didn't
C
hasn't
D
hadn't
— Is there any possible way to help the children get rid of such a bad habit?— To be honest, it’s very hard, but we ______on this problem.
#103296
A
work
B
worked
C
are working
D
were working
The book has been translated into thirty languages since it ______ on the market in 1973.
#101454
A
had come
B
has come
C
came
D
comes
-----What were you up to when she dropped in?------I______ for a while and _____ some reading.
#102898
A
had played ; did
B
played; did
C
had played :was going to do
D
was playing; was going to do