1. fill in with present continuous. 1 he is sitting (sit) at the desk. 2 the bog (sleep) 3 ann swim) 4 tony ) a letter. 5 the ) 6 mum ) a cake. 2. add –ing to the verds and put them in the correct box. walk dance swim shop lie study laugh write play smoke look stop sleep die run + ing -y +ing -ing double consonant +ing 3. write questions and negations as in the examples. 1 they are listening to the radio. 2 she is drinking coke. 3 you are dancing. 4 we are playing basketball. 5 i am running.

2. The dog (именно dog (собака)) is sleeping
3. Ann is swimming
4. Tony is writing a letter
5. The birds are singing
6. Mum is making a cake

Тут, насколько понимаю, требуется добавить ing.
Walking, dancing, swimming, shopping, lying, studying, laughing, writing, playing, smoking, looking, stopping, sleeping, dying, running.

3)
Не вижу примеров, но допустим:
1. Are they listening to the radio? What are they listening to?
The are not listening to the radio.
2. What is she drinking? Is she drinking Coke? She is not drinking Coke.
3. Are you dancing? Who is dancing? You are not dancing.
4. Are we playing basketball? What are we playing? We are not playing basketball.
5. Am I running? What am I doing? I am not running.