单项选择题

Living alone in a house, the writer seems to

A．have totally forgotten her work.
B．be afraid of her neighbors.
C．get some comfort from TV programs.
D．have gone crazy.
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单项选择题
Which of the following is NOT mentioned as a reason for the disrupted sleep of travelers
A．Crossing different time zones.
B．Changing light and activity levels.
C．Working longer hours.
D．Watching out of the plane for a long time.
单项选择题
It can be seen from the last two paragraphs that
A．you can control your own body clock.
B．it is not difficult to adjust to a new time zone.
C．adjusting your watch can help you avoid jet lag.
D．there isn't much you can do to avoid jet lag.
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