_________ difficult and challenging the task may be, we must finish it on time, because there is a possibility _________we’ll be fired if we can’t fulfill the task on time．
#31669
A
Whatever; that
B
However; that
C
Whatever; which
D
However; as
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Recently my father bought an ancient Chinese vase, _____ was very reasonable.
#32957
A
which price
B
the price of which
C
its price
D
the price of whose
Air pollution is getting more and more serious, so we must take action ________ it is too late.
#30412
A
before
B
after
C
until
D
when
I was doing my homework in my bedroom _______the light went out. I did it with a candle on.
#30979
A
which
B
while
C
when
D
where
The news is spreading around the airport is a heavy storm is coming.
#80157
A
what; /
B
that; that
C
/; that
D
that; which