Is this sentence right? 我的狗是吃我的功课，我不是在开玩笑I mean "My dog is eating my homework, I'm not kidding"

The better way to say "I want a cat" and why 我要一猫 我想要一只猫 Which of this sentences is better and why?

Please check my translation... I translated a song by myself but i'm not pretty sure if it's good... I know there are a lots of mistakes.. please.. help me to check it and understand... Thaks =) 周杰倫 夜曲 (Ye Qu). 一群嗜血的蚂蚁被腐肉所吸引 我面无表情看孤独的风景 失去你　爱恨开始分明 失去你, 还有什么事好关心 当鸽子不再象征和平 我终于被提醒, 广场上喂食的是秃鹰 我用漂亮的押韵形容被掠夺一空的爱情 啊 乌云开始遮蔽 夜色不干净 公园里葬礼的回音 在漫天飞行 送你的白色玫瑰 在纯黑的环境凋零 乌鸦在树枝上诡异的很安静　　 静静听　我黑色的大衣　想温暖你 日渐冰冷的回忆 走过的走过的生命 啊~四周弥漫雾气 啊~我在空旷的墓地 老去后还爱你 为你弹奏萧邦的夜曲 纪念我死去的爱情 跟夜风一样的声音 心碎的很好听 手在键盘敲很轻 我给的思念很小心 失去你　泪水混浊不清 失去你　我连笑容都有阴影 风在长满青苔的屋顶 嘲笑我的伤心 像一口没有水的枯井 我用凄美的字型 描绘后悔莫及的那爱情 你埋葬的地方叫幽冥 为你弹奏萧邦的夜曲 纪念我死去的爱情 而我为你隐姓埋名 在月光下弹琴 对你心跳的感应 还是如此温热清晰 怀念你那鲜红的唇印 那些断翅的蜻蜓　散落在这森林 而我的眼睛　没有丝毫同情 Jay Chou Nocturne A group of bloodthirsty ants feel attracted to carrion I without expressions in my face look at a only lonely scenery. Lose you, makes the love and hate start to be clear Lose you, Is there anything good to care about? When the dove is not a symbol of pace anymore I finally was reminded that the square is a place where vulture feed. I use beautiful rhymes to describe empty loves stolen Ah, dark clouds began to occult, the night is not clean. Cemetery’s echo flying in the sky Send you a white rose, but with the environment of Pure Black it fades up. Crows on the branches strangely in silence Listening quietly in my black coat to warm you Even more cold memories comes to obstruct my life Ah ~ 4 weeks filled with mist Ah ~ I am in the open cementery Love you even after get old gracefully For you, I’m playing Chopin’s nocturne Commemorating the death of love Like the sounds of the wind Broken hearts are very good for listening A very light hand on the keyboard I give a thought carefully You are buried in a place called Nether For you, I’m playing Chopin’s nocturne Commemorating the death of love And I’m an anonymous for you Playing piano in the moonlight Induction to your heartbeats So clear… so warm Miss you and that bright red lip print Those dragonflies of broken wings scattered in the forest And in my eyes.. There is not slightest sympathy Lose you, there is nothing clear with turbid tears Lose you, even have any a shadow of a smile A moss-covered roof of the wind Laughing of my sadness There is no water, like a dry hole I use most poignant’s font Depicts regret of that love I know the sentences have a different meaning, it depends of the point of view of each person, but I just want to know if I understood the menssaje of the song in the right way, if I read it good... or in what part of my chinese I have to work more, maybe what sentences are bad written, have no sense or maybe have another meaning.. Thanks to Jura, zigokunokaze and Dan.s .. I appreciate the answers

I want to say "I am paiting my future" I want to say or write... "I am paiting my future" What of these sentences is right? and why? 我在画我的未来 Or 我在画我的将来