单项选择题

Some people dislike exercise because ______.

A．they think it is physically exhausting
B．they find it hard to exercise while on a diet
C．they don't think it possible to walk three miles every day
D．they find consulting calorie-expenditure charts troublesome

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单项选择题

Even exercise professionals concede half a point here (Line 3, Para. 2) means They ______.

A．agree that the calories in a small piece of pastry can be difficult to work off by exercise
B．partially believe diet plays a supporting role in weight reduction
C．are not fully convinced that dieting can help maintain one's new weight
D．are not sufficiently informed of the positive role of exercise in losing weight

单项选择题

If children have flu-like symptoms, their parents ______.

A．are advised not to give them aspirin
B．should watch out for signs of Reye syndrome
C．are encouraged to take them to hospital for vaccination
D．should prevent them from mixing with people running a fever