The number 9.11 is a special number,       , I think, that will be remembered by the Americans forever.
#78670
A
what
B
it
C
which
D
one
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Look! The dictionary , _____is red , is a birthday gift given by Father.
#78710
A
which cover
B
the cover of which
C
the whose cover
D
that the cove
There are so many tall trees in the forest,______________.     
#78712
A
some of them measures over 50 meters
B
some of which measuring over 50 meters
C
some of them measuring over 50 meters
D
some of which measures over 50 meters