It ______a very small village then. (　 )

A．is

B．were

C．was

___________you reading an English book? ( )

A．Do

B．Are

C．Is

用am, is, are填空
1. This _______my sister.
2. I _______ Kate.
3. She _______ my mother.
4. They _______my grandma and grandpa.
5. I _______ nine.
6. This _______ Yang Ming.

找出错误并改正：What is these?__________

用所给词的正确形式填空。
【小题1】We should stop _________ (throw) rubbish into rivers.
【小题2】In the past, the Earth _________ (be) clean and beautiful.
【小题3】My brother is __________ (plant) trees in the backyard.
【小题4】The Earth __________(get) sick now.
【小题5】We shouldn’t __________ (cut) down so many trees.