Grammar questions

Hello,
I don't jonw how to correct these sentences in term of grammar
I think '' where'' side the'' as art'' but'' difficulty might be worng.
But iI don't know how to correct them to be right words.
Can you give me a hand?
Tell me how to correct them.
Thank you for your help.

1. A severe illness where she was 6 deprived the well-known writer's hearing.

2. He is a american actor who has starred in stage and television on both sides the Atlantic Ocean.

3. Accounting is described as art of classifying, recording and reporting significant financial events.

4. The structure but behavior of many protozoans are amazingly complex for siggle-celled animals.

5. Alaska's climate and terrain divide the state into isolated regions, making highway maintenance difficulty.

Hello

My try is:
1. A severe illness when she was 6 deprived the well-known writer of hearing.
2. He is an American actor who has starred on stage and television on both sides the of Atlantic Ocean.
3. Accounting is described as an art of classifying, recording and reporting significant financial events.
4. The structure and behavior of many protozoans are amazingly complex for single-celled animals.
5. Alaska's climate and terrain divide the state into isolated regions, making highway maintenance difficult.

There would be other mistakes. You would better wait teacher's answers.

paco