1.
A:What's wrong with the boy?
B:He has a cough.
A:Why does he have a cough?
B:He may be cold.
A:What should he do?
B:He should drink some water and take some medicine.
2.
A:What's wrong with the girl?
B: She has a cold.
A:Why does she have a cold?
B: She may eat too much ice cream.
A:What should she do?
B: She should take some medicine and have a good rest.