Helen is 15 years old, and Joan is 15, too. So Helen is ____ Joan. 
#44942
A
as big as
B
as older as
C
as old as
D
so old as
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We’re tired because we have ________ yin.
#46521
A
too many
B
too much
C
much too
D
many too
Tom’s mother often does _____ exercise .
#45738
A
many
B
much
C
a lot
D
very