题目内容：

同学们，我们必须做许多有益的事情，我们才能快乐、健康地成长。请你以“How to be a heathy and happy child”为题，根据下列内容信息，写一篇不少于80词的英语短文。主要内容包括:1.保持快乐的心情；2.积极参加体育锻炼；3.思想单纯，努力学习，远离网络，结交益友；4.多与师长交流，分享心中的喃喃自语或情感。

Dear friends, we all want to grow up happily and healthily.so we have to do many things.__________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________