网址：http://m.1010jiajiao.com/timu_id_871791[举报]
I was born _______ March,1999.
A．on B．in C．at D．for
I’ll be ready _____________a minute.
A．on B．at
C．for D．in
What do you usually do ________ Christmas?
A．on
B．at
C．in
D．for
She dressed ________ dinner .
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