---_______ ? --- They are my sisters. A. How are these B. Who are they C. What are these
— What are the kids doing? — They ______ flowers in the garden.
She ______ to her feet and ran out of the room just now.
Ask John ______ here at 7 pm tomorrow.
The air in Beijing is getting much ______ now than a few years ago.
He has two pets. One is a dog, ______ is a cat.