=>
1. a. Take an eye test if it countries for a few days.
2. d. You can have a headache if you are very tired.
3. c. Take an aspirin or any other tablets ro kill the paina.
4. b. However, don't take more than two tables at any time.
5. d. There is only one disease called 'common': the common cold.
6. b. You can get a headache if yoy read for a long time.