单项选择题

A．It’s cloudy.
B．It’s fine
C．It’s cold.
D．It’s raining and col
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单项选择题
A．I’ m afraid I don’t know.B．Yes, I did.C．No, it isn’t.D．You are on the ground floor.
A．I’ m afraid I don’t know.
B．Yes, I did.
C．No, it isn’t.
D．You are on the ground floor.
填空题
operation
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