We ___________ start campfires for fire safety.  (  )

A．must

B．should

C．mustn’t

You ________ leave rubbish in a park. ( )

A．needn't

B．mustn't

C．can't

D．may not

__________ you dance? （   ）

A．Are

B．Can

C．Is

句子改错
1. I am on my way to home.
__________________________________
2. Let’s meet in the library.
__________________________________
3. This is Peter. Can I speak to Peter?
__________________________________
4. Please call again on five o’clock.
__________________________________
5. Please call him mobile phone.
__________________________________

— ____ I help you ? — ____ I have some flowers, please? — Sure. Here are you. （   ）

A．May, Can

B．Can , May

C．Can , can