单项选择题

The manager of the restaurant has made it clear that a cook will be immediately fired if he is found ______ in the kitchen.

A．smoke
B．smoked
C．smoking
D．to smoke
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单项选择题
The MBA course normally attracts 30 students per year ______ whom up to half will be from abroad.
A．it
B．with
C．of
D．from
单项选择题
How nice to see you again! You should have told me before you ______.
A．are coming
B．have come
C．will come
D．were coming
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