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

As Commander-in-Chief of the armed forces, I have directed that all measures （） for our defense.

A．had been taken
B．would be taken
C．be taken
D．to be taken

单项选择题

I was （） the point of telephoning him when his letter arrived.

A．to
B．on
C．at
D．in

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