Here are the completed sentences with the correct question words:

1. **When** do you watch TV? - Every night.
2. **How many** hours a day do you watch TV? - Three hours.
3. **When** do you usually watch TV? - In the evening.
4. **What** of TV programmes do you like to watch? - Sports, Music, and Cartoon.
5. **What** is your favourite TV programme? - Cartoon.
6. **Why** do you watch TV? - Because it’s entertaining and educational.
7. **Who** is your favourite cartoon character? - Mickey Mouse.
8. **Where** can you find out the times and channels of TV programmes? - In TV schedule.
9. **How long** does the film last? - About an hour and a half.
10. **How much** time do you spend watching TV? - One or two hours a day.