Помогите пожалуйста надо сделать номер 9! Знатоки не проходите мимо!

1. A poet's influence on people is often great. 2. They study - a lot of subjects at school. 3. Many fish cannot survive in the ocean and die. 4. I don't think people can survive in deserts without water. 5. No one can like - his behaviour. 6. The number of people on the platform was avout ten. 7. You should go to Alaska to enjoy the beauty of this US state.