问题: 英语
请教各位英语大侠一道英语题
How often do you ______?
______ Once a day,It't good for heath.
A.do exercise B.do exercise
C.take exercise D.exercises
以上应该选哪个答案，给出的答案是C，那么B为什么不可以？
解答:
朗文词典
ex‧er‧cise1 S1 W2
1for health[uncountable]DSO physical activities that you do in order to stay healthy and become stronger:
Try to fit some regular exercise into your daily routine.
Working in an office, I don't get much exercise.
do/take exercise
Most people need to do more exercise.
gentle/light exercise
Gentle exercise can be beneficial for older people.
vigorous/strenuous exercise
After the operation, you should avoid strenuous exercise.
--- B / C都正确
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