题目内容
【题目】 If you want to be healthy, you should keep on ________ every day.
A. exercising B. to exercise C. to exercising D. exercised
【答案】A
【解析】keep on后接动词的-ing形式,所以选A。
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题目内容
【题目】 If you want to be healthy, you should keep on ________ every day.
A. exercising B. to exercise C. to exercising D. exercised
【答案】A
【解析】keep on后接动词的-ing形式,所以选A。