语法填空（共10小题，每小题1.5分，满分15分）
People have known the        (important) of keeping healthy and good life habit. Everyone        ( want) to keep in good health. to keep healthy, we should have a balance     ( balance) diet.
What should we do to keep healthy? I think      is important to have a good habit. We shouldn’t spit(吐痰) in public places or throw litter（垃圾）about. We must make it rule to wash our hands before meals or       toilets（厕所）. It is important to go to bed early and get up early. It will keep us    (activity) during the day.( Do)      morning exercises every day is also good     our health. We should keep the windows open when we are sleeping. We should have more water, fruit      vegetables. Above all, we should keep our hearts in a good state . do you agree with me?
The better we get into good eating habits, the       ( happy) our life will Become。