Correced:
1. One of my friends is going to USA.
2. Each of us is coming.
3. He was killed in a violence.
4. I , as well as my four friends, am eating mangoes.
5. He gave me a piece of advice.
6. There are much crisis in Pakistan.
7. The man was absorbed in his work.
8. He advised me very well.
9. The girl is afraid of dog.
10. He came by bicycle.