Some scientists believe that it won’t be long _______ robots are widely used in all walks of life．
#82112
A
since
B
after
C
before
D
until
推荐题目
Only when the war was over .
#81856
A
did everything he take back
B
was everything taken back
C
did everything take back
D
has he taken everything back
Only after he had spent several nights working on the math problem _______ to wonder whether the problem was wrongly set.
#83053
A
that he began
B
did he begin
C
then he began
D
so that he began
He said that he didn’t know ______ to deal with the matter, so I left.
#81384
A
what
B
when
C
where
D
how
Only after his friend came _______.
#81301
A
did the computer repaired
B
was repaired the computer
C
was the computer repaired
D
the computer was repaired
Some seemingly harmless blogs might become harmful when ________ on the Internet by millions of people.
#81839
A
to read
B
reading
C
read
D
being read