【正确答案】
C
【答案解析】[听力原文] M: Hey, Mary! How's your volunteer work going? You still involved in that after-school program with the elementary school kids? W: Yeah! But I've got a problem. I'm supposed to be driving a bunch of them to the zoo tomorrow. M: Yeah? W: And I was supposed to rent a van for the trip. But I waited too long to call the rental agency to reserve one. And now it turns out they don't have any vans available for tomorrow. I don't know what to do. These kids will be really disappointed if their trip gets cancelled. M: Um... well, doesn't one of your friends here on campus have a car? I mean, couldn't you borrow it for the day? W: Yeah, probably, but I'd need to borrow two cars or there wouldn't be enough space for all the kids. M: Uh-huh. W: That's why I was going to rent the van. And then I need to find somebody else to drive too. I can't drive two cars by myself. M: Yeah, that's true. Well, I am sure you can probably find a volunteer, or if you wanted to save yourself the trouble of hunting down the second driver, well... , what about public transportation? Check the bus schedule. I think there's a bus line that goes right pass the zoo! W: Yeah! That's a possibility. But, I don't know. It might be a real challenge, supervising the kids on the bus. M: Yeah, that would be a big trouble. W: Sometimes they are a handful when they get excited. It's an option, though. What is the woman supposed to do tomorrow? 对话中女士明确提到了I'm supposed to be driving a bunch of them to the zoo tomorrow. 而这里的them指的是上面提到的the elementary school kids，故C为答案。