单项选择题

Which of the following contains fewer calories

A．Fat.
B．Sugar.
C．Protein and carbohydrates.
D．Amino acids.
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单项选择题
Americans are still gaining weight though reducing the fat intake because __________.
A．they eat regular cookies instead of nonfat ones
B．they eat too much
C．they eat too much sugar
D．they eat low-fat crackers, soups
单项选择题
From Professor Barbara's experiment, we can learn that __________.
A．people increase the number of calories they eat per day and gain weight
B．the "low fat" yogurt group ate more calories later than the other group
C．two groups ate the same amount of yogurt
D．people who eat low fat yogurt will not gain weight
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