单项选择题

All the arrangements should have been completed prior ______ our departure.

A．in
B．to
C．by
D．before
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单项选择题
So ______ is the weather in England that by lunchtime there could be thunder and lightening.
A．various
B．varies
C．variable
D．variation
单项选择题
Isn't that ______ they call peace and friendship
A．which
B．this
C．what
D．where
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