The key answer of exercise 3

1. a) John looks happy. ; b) John is looking for his costume.
2. a) She thinks the party sounds great. ; b) She is thinking of going out.
3. a) This soup tastes delicious. ; b) He is tasting the soup to see if it has enough salt.
4. a) He has three boxes of fireworks. ; b) He is having a party tomorrow.
5. a) The sun feels hot. ; b) He is feeling the jumper to see if it is soft.

In sentences 1, 2, 3, 5, the actions in sentences b are currently happening at the moment of speaking, while in sentences 4, the action in sentence b is for a future fixed arrangement. The actions in sentences a describes the people or what they think or feel.