我給你兩個都寫上,自己選吧：
一、高興的事：
　　I feel that taking exercise is good for our health.I often felt tired when I was studying before.From this term I keep on running when I get up in the morning.After class I often go to play basketball with my friends.Now I feel much better than before and I never feel tired when I am studying And I improve a lot in my lessons.So please take exercise as often as possible .
　　翻譯：
　　我覺得體育鍛煉有利于我們的健康.我常常覺得累的時候我正在研究之前.從這個學期我一直在運行,當我起床的早晨.下課后我經常去和我的朋友打籃球.現(xiàn)在我感覺比以前好多了,我從來沒有覺得累的時候我學習,我提高了很多功課.所以,請鍛煉盡可能多地.
二、傷心的事：
　　Today is a sad day for me.My lovely pet dog,Puppy,died this morning.It was sick for many days.And my mother took it to see the doctor for several times.I fed it medicine every day on time.But it still died.I am very sad to lose my best friend.
　　翻譯：
　　今天是一個悲傷的日子對我來說.我可愛的寵物狗,小狗,今天早上去世了.這是病了很多天.和媽媽帶它去看病幾次.我每天喂它吃藥的時間.但它仍然死亡.我很傷心失去我最好的朋友.如果滿意，請采納，謝謝！