______ is known to us, the 16th Asian Games will be held in Guangzhou, China in November, 2010.
#78628
A
As
B
It
C
Which
D
What
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The astronaut did many experiments in the spaceship, ______ much help for knowing space. 
#78666
A
which we think it is
B
which we think are of
C
of which we think are
D
I think which is of