单项选择题

The storm sweeping over this area now is sure to cause _________ of vegetables in the coming days.

A．rarity
B．scarcity
C．invalidity
D．variety
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单项选择题
They did not find _________ to prepare for the worst conditions they might meet.
A．worth their while
B．it worthwhile
C．it worth
D．it worthy
单项选择题
The children will have to _________ their play-time hours when school opens.
A．cut in
B．cut up
C．cut on
D．cut down
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