We decide to make ________ a rule for us room-mates to turn off the lights at 10:30 pm.
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A
that
B
this
C
it
D
one
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Tony usually gets up_____.
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A
at six thirty
B
at thirty six
C
on six thirty
D
on thirty six
We should keep _______ in the reading-room. 
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A
quite
B
quietly
C
quiet
D
quickly