问题

The accident happened ______ a cold winter morning.[ ]
A: in
B: on
C: at
D:of
B: on
C: at
D:of
正确答案是:
同类题型
He always looks ______.Now he’s looking______at his new drawing.
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What’smatter with you ?—I have a cold. I want to go tobed early.
Your father is sleeping now. Could you please ______ the CD player ?–OK, mum.