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 we are on the point of______some important business with them, we should like to know exactly about their credit standing.
A．transmitting
B．transferring
C．transacting
D．transporting
单项选择题
The English weather defies forecast and hence is a source of interest______to everyone.
A．speculation
B．attribution
C．utilization
D．proposition
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