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We should protect the animals ______danger.
#50745
A
on
B
in
C
of
D
at
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The accident happened ______ a cold winter early morning.
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A
in
B
at
C
on
D
for
I often go swimming with my father______Sunday.
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A
in
B
on
C
at
D
of
His mother is friendly____ us.
#48964
A
of
B
to
C
on
D
at
－Where did you go _____ the morning of April 6?－I didn’t come to the office _____ the meeting was over.
#49484
A
in, when
B
at, unless
C
on, until
D
to, though
Chinese is used ______ the largest number of people in the world.
#49529
A
to
B
for
C
by
D
as