As you know,smile is an attitude to life.please learn to smile! --不连贯--For example,when you feel uncomfortable，you need your friends.Do you want to cry?No,no.You should learn to smile to life.You should learn to smile with your friends .I hope you're happy.I hope
you can smile.要点基本上都没表达出来， 还有写文章，要书面化，不要搞得好像两个人在对话那样
We must save water!Water is the best friend of people.Why must we save water?This is a fool problem!Do you want to die? Our answer must be"No".
So,people can't live without water!We need water!
这几个要点也没提到， What do we use water for?What can we do to save water?
可加一两句：we use water for drinking,washing,watering and so on.
等等