ПОМОГИТЕ!!!!! Read and choose.
e.g.She is/are carrying the box of chocolates.
1. He is a great cook. He is/can cook really well.
2. Look!Mary is dance/dancing!
3. Are you/Can you ride a bike?
4.Harry and Tom aren't/isn't sleeping. They're in the garden.

1)  He can cook really well2) Mary is dancing3) Can you ride a bike?4) Harry and Tom aren't sleeping