Sure! Here are the sentences based on the prompts given:

1. Relaxing is really important for our mental health.
2. It’s easy to get the flu; we should try to avoid going out in cold weather.
3. I have a toothache because I ate too many sweets yesterday.
4. He has the flu; he keeps sneezing and coughing.
5. Which activity uses more calories: walking or riding a bicycle?
6. You shouldn’t play computer games in your free time.
7. The doctor is asking Mai questions about her health problems.
8. Vitamins play an important role in our diet.
9. We should keep our bodies warm and avoid the cold.
10. Getting enough rest will help you concentrate in school.