单项选择题

If you cross the ocean going east, you set your clock______.

A．ahead one hour in each new time zone
B．ahead one hour for the whole trip
C．back one full day for each time zone
D．ahead by twenty-three hour
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单项选择题
Strange things happen to time when you travel because______.
A．no day really has twenty-four hours
B．the earth is divided into time zones
C．time zones are not all the same size
D．no one knows where time zones begin
单项选择题
Size 10 is ______tight for my daughter. Show me a wider pair.
A．very
B．so
C．too
D．quite
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