It was April 29, 2011 ______ Prince William and Kate Middleton walked into the palace hall of the wedding ceremony.
#78083
A
that   
B
when
C
since  
D
before
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It was an unpleasant subject ____ we _____ for a long time.
#76789
A
about which…discussed
B
about which…argued
C
over them…argued
D
which…argued