单项选择题

He set up in business ______ his own and was very successful.

A．in
B．of
C．on
D．by
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单项选择题
Mary is 18 years old this year; she ______ 19 next year.
A．will be
B．is to be
C．is going to be
D．should be
单项选择题
The small mountain village was ______ by the snow for more than one month.
A．cut back
B．cut out
C．cut off
D．cut away
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