Viết lại câu sao cho nghĩa không đổi

Viết lại câu sao cho nghĩa không đổi ( có dùng enough hoặc too)

1. This picture is 10.50 dola , I have only 9.50 dola so I can't buy it

I haven't .........
2) she is six years old, she can start school
-> she is old...........
3) there is a lot of pollution in big cities
-> the air can't clean.................
4) it is very high. minh doesn't jump over
-> it is...................
5) there are plenty of people on the road. we can't cross now