Read and choose. （选择最佳答语）

1. What colour is your sweater?          [ ]

A. It's on the chair.            

B. It's yellow.        

C. It's a sweater.

2. Where is the art room?           [ ]

A. It's on the floor.                

B. It's on the second floor.

C. It's the second one.

3. Can I wear my new shirt. today?          [ ]

A. No, you aren't.  It's cold.        

B. No, you can.  It's cold.

C. No, you can't.  It's cold.

4. Are they goats?          [ ]

A. Yes, there are.                

B. Yes, they are.        

C. Yes, they aren't.

5. Can I help you?         [ ]

A. Yes.  I want 5 tomatoes.    

B. Yes, here you are.  

C. Thank you.

以下哪种是ISDN接口（）。

A.BRA

B.V5

C.PRA

D.RSA