单项选择题

Because of modem technology, some mountain areas are not isolated ______ the outside world.

A．with
B．away
C．from
D．off
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I wouldn't doubt ______ she would want to help.
A．whether
B．since
C．that
D．as
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I shall have a companion in the house after all these ______ years.
A．alone
B．single
C．lonely
D．simple
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