选用下面的动词的适当形式填空（每词限用一次）
spend think eat sound feel believe keep be run drink
What is the most important thing in the world?I____it is heath.Many people think it____hard to keep heathy.But I don't think so.I'm pretty healthy and this is my lifestyle.I____an apple every day.Because I____that "an apple a day keeps the doctor away".I also eat lots of vegetables,and I don't eat too much junk food.I enjoy____,so I run to school every morning.It helps me____heathy.I think it's important____enough(足够的) water,so I drink eight glasses(杯) of water every day.What's more,I often____some time with my friends.We often do some sports and go to the movies.We all feel happy.I think____happy is also important.These things____easy to do,right?So everyone,in order to be healthy,please do them from now.