Ответ:

1A Is Mike climbing the mountain?

B Yes, he is.

2A Are Sue and Frank swimming in the pool?

B No, they aren't.

3A Are you listening to music?

B Yes, I am.

4A Is Emma phoning her Mum?

B No, she isn't.

1.) Is Mike Climbing the mountain?

Answer: Yes, he is

2.) Are Sue and Frank swimming in the pool?

Answer: No, there aren’t

3.) Are you listening to music?

Answer: Yes, I am

4.) Is Emma calling her mum?

Answer: No, she isn’t