单项选择题

The tail exhaust pipe of the motor vehicle _________poisonous smoke.

A．disposed
B．emitted
C．launched
D．projected
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单项选择题
It's _________Mike! We thought you were in Europe!
A．other than
B．none than
C．none other than
D．no other than
单项选择题
All flights _________because of the heavy fog, we had to decide to take the train.
A．were canceled
B．having canceled
C．having been canceled
D．have been canceled
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