A、A taxi driver. B、A bus driver. C、A truck driver. D、A passenger. A由This is the emergency 911 operator．可知，对话中两人在打电话，并且对话中女士的身份是

W: Hello. This is the emergency 911 operator.
M: Help. Help. Please help me !
W: Yes sir. Please calm down and explain exactly what is happening.
M: Calm down! My car is stalled on the freeway, I have a lady passenger, and she’s going into labor.
W: Now relax sir. Explain exactly where you are.
M: I’m... I’m in the southbound lane of the Lincoln Expressway, about 15 miles from the Washington Tunnel, and this lady isn’t going to wait.
W: Okay. What’s your name sir and your passenger’s?
M: It’s... it’s Bob, and I have no idea about the woman. She’s in no condition to tell me.
W: Okay, now what’s the nearest landmark to your location7 Pay careful attention.
M: Umm, I see golden arches... McDonald’s.
W: Okay, is there anyone else with you?
M: No, and I’ve tried to get someone else to stop. [ The sound of a bottle breaking. ]
W: Hey, what was that?
M: Ah, someone threw a bottle at me. How soon can someone get here?
W: I’ve just dispatched an ambulance .to your location. They should be there any second.
M: Hey, is there anything I can do while we wait for the ambulance7
W: Yes, uh, keep her calm and warm.
M: Okay. Please hurry. Oh, they’re too late. It’s a boy!