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
-----Hurry up. Xiao Shenyang is coming. ------ Oh, I was afraid that we_____.
#105008
A
already miss him
B
had already missed him
C
will miss him already
D
have already missed him
The water supply has been cut off temporarily because the workers ____ one of the main pipes.
#100577
A
had repaired
B
have repaired
C
repaired
D
are repairing
--I have you asked John to come to the party this evening？--Yes，I have，but he＿＿＿＿
#100482
A
doesn't
B
hasn't
C
hadn't
D
won't
—Mr. Boris. This is Grand Cartel. You’ve left your luggage here.—Goodness me! So I . I’ll go back and get it right away.
#102714
A
have
B
had
C
was
D
have done
One third of the class _____ agreed to be volunteers to help the aged this vocation.
#103534
A
are
B
is
C
has
D
have