单项选择题

By mid-night ______ workers said they had found all those injured in the boat accident.

A．rescue
B．salvage
C．safety
D．relief
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单项选择题
We always lay in a large ______ of tinned food in winter in case we are snowed up.
A．proportion
B．storage
C．provision
D．supply
单项选择题
You are allowed to ______ in the fast lane on a motorway.
A．overtake
B．overthrow
C．overturn
D．overrun
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