Je ne comprend pas l'exercice 41 et 42 ( pas faire le 43)

Exercice 41 : 

1. Bruce is eating at the cafeteria.
2. Alison is sleeping.
3. The Fosters are watching TV.
4. Mr Mckay is taking a shower.
5. Bruce is working at school.

Exercice 42 : 

1. What do you do ?
--> I am a vet.

2. What are you doing ?
--> I am eating.

3. What are you eating ?
--> A hamburger

4. I never eat hamburgers.

5. Well, you know what you miss ?