单项选择题

The teacher doesn' t permit ______ in class.

A．smoke
B．smokes
C．to have a smoke
D．smoking
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单项选择题
Hospital doctors don' t go out very often as their work takes ______ their time.
A．away
B．over
C．in
D．up
单项选择题
He traveled to the Northern part of the country, ______ he got many new ideas for this book.
A．which
B．there
C．where
D．that
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