(2013·四川省乐山一模)The pupils were playing games in the classroom ________ a gunman entered and began shooting wildly at them.
#30425
A
while
B
when
C
as
D
before
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How can you expect to get ahead in your life ______ you even live to yourself from time to time?
#30385
A
though
B
until
C
before
D
when
We thought there were 35 students in the dining hall, ______, in fact, there were 40.
#80566
A
while
B
whether
C
what
D
which