Найдите ошибку.1. Who does play the violin?2. What you mean?3. I

Найдите ошибку.
1. Who does play the violin?
2. What you mean?
3. I am not understanding the plan.
4. The soup smell really good.
5. How much it costs?

6. I am thinking he's a very intelligent boy.
7. It often raining in Autumn.