This is the most interesting book _____I have ever read.   
#42847
A
which
B
that
C
/
D
B and C
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I like music   ___ I can dance to. And you?
#43147
A
what
B
who
C
that
D
when
 I really want to know _______.
#42918
A
what is wrong with my brother
B
how will he go to Beijing tomorrow
C
if had he bought that car
D
where did he go yesterday