The art center is ______ used to be Factory 789 and _______ millions of tractors were made. 
#4994
A
what; where
B
where; where
C
that; which
D
where; which
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Since Claire had become attached to Tony, the robot needed _______________.
#4523
A
to rebuild
B
to have rebuilt
C
being rebuilt
D
to be rebuilt
It is not  _____ that Sanlu has been connected to a scandal involving milk powder, according to China Daily.
#4654
A
for the first time
B
the first time
C
first time
D
in the first time