My teacher's in hospital.

[　　]

A．I don't know

B．Can she?

C．Is she? I didn't know that.

Read and choose the correct answer

How long has he studied English?

[　　]

Why are you stopping here?

[　　]

A．I don't live here.

B．This is my house.

C．I'm not waiting.

What's the matter with you?

[　　]

A．My leg hurts.

B．Your leg hurts.

C．It's OK.

Read and choose the best answer

－May I smoke here?

－No, you ________.

[　　]

A．may not　　B．mustn't　　C．needn't