⑴What are you doing?                              A. It's sixty yuan.

⑵How much is it?                                      B. No, they aren't.

⑶Do you often come to the library?          C. Yes, I do.

⑷What are they doing?                             D. They're playing ping-pong.

⑸Are they doing the high jump, too?        E. I am making a call.