单项选择题

In previous times, when fresh meat was inadequate, pigeons were kept by many households as a source of food.()

A. in short store
B. in short provision
C. in short reserve
D. in short supply

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单项选择题
She has proved that she can be relied on in a crisis.()

A. lived on
B. depended on
C. lived off
D. believed in
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