Ⅰ、1、see a doctor
2、feel sick
3、have a stomachache
4、had better
5、have a headache
6、have a cold
7、take medicine
8、stay home
9、have a good rest
10、tell sb. to do sth.
Ⅱ、1、hurts
2、to rest
3、had better
4、matter
5、take
Ⅲ、
Ⅳ、1、What ' s wrong with you?
2、Do you have a headache?
3、Yes. I do.
4、You catch a cold.
5、Thank you very much.