We should try to stay healthy and strong. We should eat breakfast everyday. We should also eat more vegetables and fruits because they contain lots of vitamins. We should get up early and not stay up late because we need to have enough sleep. Furthermore, doing exercises everyday is also important to keep us fit and healthy.你觉得是楼上的写的好还是你写的好我觉得他好像比你好诶= =仁者见仁· 一般会用firstly 或者secondly 所以我不会用他的用法 我也不会在这种情况下用must 你想用他的无所谓啊-。-你要觉得是他好 就应该采用他的·