A．It changes the body's metabolism through rapid weight gain.
B．It tricks the body into responding as if it were in a different time zone.
C．It promotes increased alertness by adding snacks to the diet.
D．It builds resistance to illness by increasing intake of vitamins.
A．He feels rushed.
B．He hates to pack.
C．He doesn't like to restrict his diet.
D．He's worried about his lecture.
A．He has a big appetite.
B．He eats only at regular mealtimes.
C．He avoids new foods.
D．He eats only healthful foods.
A．The connection between British and American English.
B．The differences between British and American English.
C．The difficulty in distinguishing British and American English.
D．The importance of distinguishing British and American English.