单项选择题

Flying in a westward direction will

A．help you sleep better.
B．increase the degree of jet lag.
C．shrink your day.
D．make you overeat.
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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.
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.
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