单项选择题

What can we learn about the subjects in the CALERIE study

A．They were selected by the National Institutes of Health.
B．They were divided into two groups according to their sex and age.
C．Half of them became thinner after the study.
D．They received periodical medical checks during the 6 months.
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单项选择题
It can be inferred from the first paragraph that ______.
A．an effective calorie restriction involves taking little food while doing much exercise
B．calorie restriction is proved to be effective in preventing illness in some animals
C．some drugs are taken by people to live longer without suffering from starvation
D．before the 1930s,people did not believe in the positive effect in extending lifespan
单项选择题
The peasants in India call for a reform on land ownership because ______.
A．they do not have enough fields to support their families
B．their interests are severely infringed by the fast expansion of urban areas
C．their rights to own a piece of land have been taken by the government
D．they are losing land without getting any money from the government
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