单项选择题

We'll visit Europe next year ______ we have enough money.

A．lest
B．until
C．unless
D．provided
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单项选择题
I didn't know the word. I had to ______ a dictionary.
A．took out
B．make out
C．refer to
D．go over
单项选择题
The price of beer ______ from 40 cents to $ 4per liter during the summer season.
A．altered
B．ranged
C．separated
D．differed
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