(2013·高考北京卷)Don’t turn off the computer before closing all programs，________you could have problems.
#30670
A
or
B
and
C
but
D
so
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Leave your key with a neighbor ________ you lock yourself out one day.
#33070
A
soon after
B
even if
C
ever since
D
in case
My colleague has been recovering gradually since the operation, and it wont’ be long ______ he comes back to work．
#31739
A
before
B
since
C
after
D
when
As many as five courses are provided, and you are free to choose_______ suits you best.
#31464
A
whatever
B
whichever
C
whenever
D
wherever
It’s widely accepted that life is ___ there’s sunshine and water.
#30146
A
there
B
where
C
in the place
D
in which
Remember that there is still one point ______ we must make clear at the conference tomorrow.
#34331
A
where
B
why
C
when
D
that