3. Complete the sentences with the present continuous affirmative from of

Lll.
1. We are sitting in the park.
2. David is studying Chinese. 
3. I am working at the moment.
4.The dogs are eating tn the kitchen.
5. Sarah is having breakfast.
lV.
1. We are not sitting in the park.
2. David is not studying Chinese. 
3. I am not working at the moment.
4.The dogs are not eating tn the kitchen.
5. Sarah is not having breakfast.
V.
1)  Are you doing a test?  - Yes, I am.
2)  Is your teacher sleeping?  - No, she isn't.
3)  Are your friends studying? Yes, they are 
4)  Is it raining today?  - No, it isn't.
5)  Are your classmates singing?  - No, they aren't.
6)  Is your dad working? - Yes, he is.