用所给词的正确形式填空。
1. Your father looks very (health).
2. You must look after (you).
3. (read) in bed is bad for your eyes.
4. He (be) ill yesterday.
5. I stayed away from school for (little) than a week last term.
6. You (be) not here yesterday morning.
7. Doing eye (exercise) is good for your eyes.
8. Do you like eating (vegetable)?
9. She was away for (many) than three weeks last year.
10. I (usual) get to school very early.
的主要临床症状是（）。