修改英语对话,

修改英语对话,
看看有没有语病,语句不通顺的也帮忙改一下,
All of plants are very interesting.
Yes,but not all plants are useful.
What can we do with some useful plants?
We use wood to build houses.
Bamboo can do so.
Then we use some of plant for food.
And others to make clothes.
Except that,doctors in China use plants to make medicines to make people well.
Taht's good.what about the dead trees?
In the ground,dead trees slowly turn into coal?
Coal?What can we do with coal?
We use coal to make our houses warm and to make our factories work.
哪一句怎么改，要加、减些什么~