4.1
2. Are you going now?
3. It is raining?
4. Are you enjoying the film?
5. Is that clock working?
6. Are you writing a letter?
4.2
2. Where is she going?
3. What are you eating?
4. Why are you crying?
5. What are they looking at?
6. Why is he laughing?
4.3
3. Are you listening to me?
4. Where are going your friends?
5. Are your parents watching television?
6. What is Ann cooking?
7. Why are you looking at me?
8. Is the bus coming?
4.4
2. Yes, I am. // No, I'm not.
3. No, I'm not. // Yes, I am.
4. Yes, it is. // No, it's not.
5. No, I'm not. // Yes, I am.
6. Yes, I am. // No, I'm not.