The agent was about to sign his name to the document ________，to our surprise，a stranger broke in to prevent him.
#30223
A
while
B
when
C
as
D
until
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He looks so weak and pale ________ suffering from a serious illness.
#32549
A
as if
B
as long as
C
now that
D
even if
It took several hundred years ______ paper-making spread to western countries.
#33423
A
when
B
before
C
after
D
since
---__________ will this goal be achieved? --- After 2011.
#33321
A
How long
B
How often
C
How soon
D
How far
A total of 548 students fell ill ______ consuming milk and biscuits in schools in Northwest China's Qinghai province on Wednesday, local authorities said.
#31253
A
before
B
when
C
after
D
while
----- Where will I put the MP4?----- Put it ______ we can all see it.
#31102
A
when
B
since
C
where
D
unless