根据要求改写句子（英语） 十万火急！！！

1. What is environment?  (估计all the things round us）
   

2. What do they tell people?  （估计not to pollute water）
   

3. I've never been to America yet.

4. I can look after your dog after you go out.

5. We should no pollute the water.

6. Have you visited a lot of places in Shanghai?

7. Where does Kitty's cousin live?  (估计in the USA)
   

3.I have never been to America.（改否定句）

4.I can keep an eye on your dog after you go out.（保持原句意思）

5.We should prevent water from pollution. （保持原句意思）

6.Have you visited a lot of places in Shanghai.（改一般疑问句）

1,2,7没有划线部分啊？

看不到划线部分啊