September 8th，1931 is a special day，________, I think，that will be remembered by the Chinese forever.
#15322
A
one
B
it
C
which
D
that
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Legend has ______ that CaoCao, King of Wei kingdom in the Three Kingdoms period, built 72 tombs to confuse tomb diggers.
#16362
A
it
B
this
C
them
D
itself
The editor asked me to write another article for them, _____about environmental protection.
#16814
A
any
B
one
C
that
D
each