从方框中选择适当的句子补全对话，其中有两项为多余选项

A. I' m a doctor. B. Where are you now? C. This is Scott Smith D. How will you come？ E. What's happening? F. Stay with her and don't move her. G. How long will I have to wait?

A: Hello! This is 911. Who is that speaking.

B:  Help! Help! Please help me!

A: Yes, sir. B: My wife is seriously ill. She's having a heart problem

A: Now relax, sir. B: I'm on Lincoln Highway, about 15 miles from Washington

A: OK. I'll send an ambulance as soon as possible.

B:

A: For about ten minutes.

B: All right. What should I do while waiting?

A:

B: OK. Thank you and please hurry.