_________ 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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We don’t doubt _____ he can do a good job.  
#34097
A
whether  
B
that  
C
how
D
why
________ we know, the moon goes around the sun.
#32297
A
As long as
B
As far as
C
As much as
D
As soon as