1.  Also they don't have white teeth like Chinese .

2.  I have no experience .

3.  Many of us didn't have umbrellas.

4.  Many of us didn't have umbrellas.

5.  People in many parts of China have not enough food and clothes.

6.  Some of us didn't have breakfast until the second class was over.

7.  I wouldn't have a lot of breakfast.

8.  I could not have so much knowledge without book.

9.  Since the new term started, I haven't study hard as I did last term, but some good results covered my problems.

10.  The streets I have been in the No.4 Middle School or almost five years, the streets around the school have no change, too.