Have you ever been to Mount Huangshan, ___________is famous for its pine forests and "sea of clouds"? 
#78410
A
what
B
where
C
that
D
which
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I have many friends, some        are businessmen.
#77096
A
of them
B
from which
C
who of
D
of whom
There are two caps on the table, _____ belongs to Tom.
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A
the smaller of which
B
the small of that
C
the smaller of them
D
the small one