7. Please do eye exercises to keep your eyes from getting dry.

-> to V: để làm gì

-> keep sth from Ving: ngăn cái gì khỏi

8. People in Iceland eat a lot of fresh fish.

-> thì HTĐ (S Vs/es)

9. Air pollution is really harmful to our health.

-> be harmful to: có hại cho

10. Going to bed and getting up early are good for your health.

-> S be adj (chủ ngữ số nhiều, dùng are)

11. Healthy food, love, and laughter bring a healthy life.

-> and: và

-> bring a healthy life: mang lại một cuộc sống lành mạnh