Who might dislike the idea of arranging books by their colors ？
A. Those who like painting on the bookshelves.
B. Those who tend to arrange anything scientifically.
C. Those who are color-blind.
D. Those who usually cannot remember the colors of books.
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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 a avoid jet lag.
D. there isn’t much you can do to avoid jet lag.
A．buy B．cost C．sell D．consume
A. buy
B. cost
C. sell
D. consume
Air pollution can be as harmful to one\\\\\\\'s health___________
A. on the downwind side
B. during rush hours
C. in spring and autumn
D. to toxic air
E. between autumn and winter
F. as exposure to nuclear radiation
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