单项选择题

The immune system ______.

A．used to be unconnected with the brain
B．causes a lot of stress to people
C．can be affected by emotional factors
D．functions independently
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单项选择题
Which of the following would be the best title for the passage
A．Eating Without Gaining.
B．Exercise--An Effective Weight-loss Tool.
C．Metabolic Changes in Human Body.
D．Ways of Weight Control.
单项选择题
Which of the following statements about weight control is NOT TRUE
A．The exercise is the secret to permanent and successful weight control.
B．Combining exercises with a reduced-calorie diet makes it easier to lose weight.
C．Healthy weight control means losing primarily fat, not muscle or water.
D．Eat less and skip the exercise is an easy and effective way of losing weight.
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