The accident happened _____ a cold winter morning.
#49642
A
on
B
in
C
at
D
of
推荐题目
Be polite ____ others! 
#48477
A
to
B
at
C
about
D
on
Reading_____the sun is bad for your eyes.
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A
under
B
in
C
at
D
on
That’s very kind _________you _________me.
#47160
A
of; help
B
of; to help
C
to; to help
D
for; helping