单项选择题

--Do you know ______ the price of meals on the railway has increased recently--Yes, by 15%.

A．how long
B．how often
C．how much
D．how soon
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单项选择题
When the peace talk failed, there was a very real fear that war may ______ at any time.
A．break out
B．break up
C．break off
D．break down
单项选择题
--This program is killing me! Everything has to be finished before next Friday.-- ______, John. It's not the end of the world.
A．Take it easy
B．Take care
C．Be careful
D．Be yourself
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