单项选择题

A．break
B．holiday
C．interval
D．course
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单项选择题
A．OccasionallyB．UnfortunatelyC．ActuallyD．Naturally
A．Occasionally
B．Unfortunately
C．Actually
D．Naturally
单项选择题
A．The plane is full.B．The plane is late.C．The plane has broken down.D．The flight is canceled.
A．The plane is full.
B．The plane is late.
C．The plane has broken down.
D．The flight is canceled.
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