答案：
解析：
Do we need sports？ Every day we only have a little time for sports because we have so much homework to do．Our parents usually keep us away from sports because they think taking exercise is wasting time．In their opinion we don't need exercise because we are healthy enough．But in fact they don't know that we are often tired and sleepy after a long time of studying．Some of us even feel bored in our lessons．So it's quite necessary for us to take exercise．I think we must have at least one hour to exercise every day．Doing sports is a good way to relax and keep fit．What's more a healthy body can help us study better and live a happier life．

答案：
解析：
Do we need sports？ Every day we only have a little time for sports because we have so much homework to do．Our parents usually keep us away from sports because they think taking exercise is wasting time．In their opinion we don't need exercise because we are healthy enough．But in fact they don't know that we are often tired and sleepy after a long time of studying．Some of us even feel bored in our lessons．So it's quite necessary for us to take exercise．I think we must have at least one hour to exercise every day．Doing sports is a good way to relax and keep fit．What's more a healthy body can help us study better and live a happier life．