单项选择题

In previous times, when fresh meat was in short ______ , pigeons were kept by many households as a source of food.

A．store
B．provision
C．reserve
D．supply
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单项选择题
We have been told that under no circumstances ______ the telephone in the office for personal affairs.
A．may we use
B．we may use
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D．did we use
单项选择题
Some people would like to do shopping on Sundays since they expect to pick up wonderful ______ in the market.
A．batteries
B．bargains
C．baskets
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