单项选择题

Questions 11 to 18 are based on the conversation you have just heard.

A．She wants to make sure if she graduated successfully.
B．She has applied for the man’s school as a postgraduate this autumn.
C．She has called her teachers to ask some academic questions.
D．She is preparing for her graduate paper.
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单项选择题
The CALERIE study is a turning point in the research field in ______.
A．studying the effect of calorie restriction on human beings instead of animals
B．having subjects with a wide range of age and weight
C．proving the positive effect of calorie restriction on prolonging people's life
D．excluding the positive effect of obesity reduction on keeping health
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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