一Is that your book?    一Yes___________.

    A．it  is    B．it   isn’t    C．it’s

— Hello, this is Tina speaking. Is that Sam?
— Sorry, he isn’t here at the moment.       ?

--- Hello, this is Tina speaking. Is that Sam?

--- Sorry, he isn’t here at this moment. __________?

　 A. Can I take a message　　 B. What are you saying to Tina

　 C. May I speak to Sam　　　 D. Who’s that speaking

---- Hello. ________ Tina speaking. Is that Sam? ---- Sorry, he isn’t in.

一Is that his dictionary?

— ___________ .

A．Yes，it isn’t B．No．that isn’t

C．Yes，he is D．No，it isn’t