Many students believe the choice of their universities should _______ their own interests. 
#65099
A
be based on
B
base on
C
be basing on
D
base at
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---Tom, keep your_____ on your studies. --- Sure, mum. I'll keep that in_____.
#84113
A
mind;mind
B
heart;head
C
brain; mind
D
heart;brain
The electricity ____, the light went out.  
#77100
A
cut off
B
having cut off
C
was cut off
D
had cut off