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A. I am watching television.
1. He is doing his homework.
2. Jack is listening to the radio.
3. They are running fast.
4. The dog is barking (?).
B. She isn't writing an email to her friend.
1. She isn't (qual é o verbo?) in this house.
2. We aren't sitting on a comfortable chair.
C. 1. Are they lying to their mother?
2. Are Mary and John riding a bike at the park?
3. Is Susan cutting her hair at the hairdresser?