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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