[单项选择]

When the world was a simpler place, the rich were fat, the poor were thin, and right-thinking people worried about how to feed the hungry. Now, in much of the world, the rich are thin, the poor are fat, and right-thinking people are worrying about obesity.
Evolution is mostly to blame. It has designed mankind to cope with deprivation, not plenty. People are perfectly tuned to store energy in good years to see them through lean ones. But when bad times never come, they are stuck with that energy, stored around their expanding bellies.
Thanks to rising agricultural productivity, lean years are rarer all over the globe. Modernday Malthusians, who used to draw graphs proving that the world was shortly going to run out of food, have gone rather quiet lately. According to the UN, the number of people short of food fell from 920m in 1980 to 799m 20 years later, even though the world’s population increased by 1.6 billion over the period. This is mostly a cause for c
A. No serious wars occurred.
B. Lack of consideration for the diseases associate with growing fat.
C. Growth of the food supply.
D. Lack of medical treatment for the problem of growing fat.

[单项选择]

When the world was a simpler place, the rich were fat, the poor were thin, and right-thinking people worried about how to feed the hungry. Now, in much of the world, the rich are thin, the poor are fat, and right-thinking people are worrying about obesity.
Evolution is mostly to blame. It has designed mankind to cope with deprivation, not plenty. People are perfectly tuned to store energy in good years to see them through lean ones. But when bad times never come, they are stuck with that energy, stored around their expanding bellies.
Thanks to rising agricultural productivity, lean years are rarer all over the globe. Modernday Malthusians, who used to draw graphs proving that the world was shortly going to run out of food, have gone rather quiet lately. According to the UN, the number of people short of food fell from 920m in 1980 to 799m 20 years later, even though the world’s population increased by 1.6 billion over the period. This is mostly a cause for c
A. compare Father Christmas with the four horses of the apocalypse.
B. stress how fat people now on the earth.
C. prepare the appearance of "horse" in the next sentence.
D. make the passage road interesting.

[单项选择]Even when they were allowed to work, they were never given responsible jobs.
A. 即使她们允许别人工作，她们也会负起责任。
B. 即使她们被允许工作，她们也不会负起责任。
C. 即使她们被允许工作，她们也决不会得到合适的工作。
D. 即使她们允许别人工作，她们也不会给别人合适的工作。

[单项选择]The planes disappeared when they were flying near the United States.

[单项选择]We were talking on the phone when we were ______.


A. cut down
B. cut off
C. hung up
D. hung back

[单项选择]When plastics were invented a hundred and twenty years ago, _____________.
A. people found they were cold materials
B. their shapes were set permanent
C. people accepted them at once
D. they did not enjoy immediate popularity

[单项选择]According to the passage, when stamps were used the postage would be ______ that in the early 19th century.


A. higher than
B. lower than
C. the same as

[单项选择]Probably the man was going to leave the place when ______.


A. he found a big fish
B. all his bait was gone
C. he threw the small fish into the river