China’s population is expected to increase to about 1.5 billion, ____ it will start to decline slowly.
#76400
A
after that
B
since when
C
on which
D
after which
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That art center is ____ used to be a factory,_____ millions of cars were made.
#78087
A
what; which
B
where; where
C
what; where
D
where; which
Everything he _______ to his country.
#76889
A
had donated
B
had been donated
C
had to be donated
D
had was donated
Do you know the man ________? 
#75616
A
whom I spoke
B
to who spoke
C
I spoke to
D
that I spoke