1)My mother cooking in the kitchen, I was doing my homework in my room. （表伴随）我妈妈正在厨房做饭，我在房间里做作业。
加粗后的括号为修改部分
Learning you are interested in our cultural heritage protection, I am delighted introduce(to introduce) something about them. Over the past decades, we have made a great (great) progress. Every year a lot of efforts are made and much money are (is) spent studying and protecting the (去掉 the) cultural heritage sites. And people are more aware of the important(importance) of preserving the (去掉 the) cultural heritage sites. Therefore, we are still faced with great challenges in protecting our cultural heritage sites today. They have to make way to new buildings. Even worse, a number of (several) historic spot (spots) have more or less been destroyed, what (which) worries us a lot. Considered (Considering) the current situation, I think more effective measures should be taken to protect our cultural heritage sites.
