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Ответ:

Объяснение:

Exersice 3.

2.isn't playing

3.aren't walking

4.aren't speaking

5. am not laughing

6. aren't watching

Exersice 4.

1.are listening to us

2. isn't doing her homework

3. am concentrating on this exersice

4. are going to our Art class

5. is eating his lunch