听力原文：

W: Hello! This is 911. Who is that speaking?

M: This is Scott Smith. Help! Help! Please help me!  

W: Yes, sir. What’s happening?  

M: My wife is seriously ill. She’s having a heart problem. 

W: Now relax, sir. Where are you now? 

M: I’m on Lincoln Highway, about 15 miles from Washington Tunnel. 

W: OK. I’ll send an ambulance as soon as possible. 

M: How long will I have to wait? 

W: About ten minutes.  

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

W: Stay with her and don’t move her.

Question: Why did Scott Smith call 911?

参考答案：

Because his wife is having a serious heart problem.