单项选择题

Dogs have a very good ______ of smell and are often used to search for survivors in an earthquake.

A．sense
B．view
C．means
D．idea
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单项选择题
My parents will move back into town in a year or ______.
A．later
B．after
C．so
D．about
单项选择题
______ fire, all exits must be kept clear.
A．In place of
B．Instead of
C．In case of
D．In spite of
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