同学你好，该知识点来自沪江网校《【Uni智能】雅思7分一站式VIP-高中起点【11月签约现金奖励班】》的课程，想要更系统的学习，欢迎进入课程学习。不仅可以和更多的同学一起学习，而且还有老师、助教随时的学习指导和知识点解答哦。

同学你好,
I'm 19 years old.I'm a happy girl. I have a happy family.可以合成一句话噢:I’m 19 years old and a happy girl, with a happy family.
They're busy. But at weekends, they always cook nice food for me. 这两句可以用although连接
classroom buildings改为teaching building
The place enjoys a temperate climate with well-marked seasons with plenty of rainfall and sunshine. 这句话不是很懂哦，如果你想表达你很喜欢某种天气主语应该是你自己。
问题主要有：简单句用得有点多，建议在简单句上使用连接词或者从句等等让句型结构更加丰富。也有一些小的语法错误，之后要继续拓展词汇量噢，继续加油