Look, your sister is playing the piano over there.－She ______ be my sister. She has gone to America.

The lovely girl is from Class 6.name is Alice.

How often do I need to feed the dog?——It___food everyday, or it will be hungry.

I don’t know the teacher is talking with Miss Wang.[ ]

Do you know this boy?He works really___.–Yes, I can ___ see him play. He always studies.