听力原文：W: What do you do for a living, Frank？M: I am an aerospace engineer. I have been

听力原文：W: What do you do for a living, Frank？

M: I am an aerospace engineer. I have been working for NASA for over fifteen years.

W: Wow, that sounds fascinating. What projects have you been involved in？

M: Well, until recently, I was heavily involved in the Cassini mission. I don't know if you're familiar with it or not. It's one of NASA's most expensive and ambitious projects. We are sending a probe to explore Saturn and its moons.

W: That sounds really interesting. Are you in any way involved in the construction of the international space station？

M: Actually, that's what I'm working on now. I'm currently a technical liaison between NASA and several European space agencies. It's an interesting job, but it can be a bit too much at times. The international space station is probably the largest international venture ever attempted, and I am constantly dealing with technical difficulties, budget problems, and delays. It's not easy coordinating the efforts of all those countries. I have been to Europe three times in the last month, and I have to go to Kazakhstan next week.

W: And I understand there's some controversy surrounding the space station. Don't some people worry that NASA is spending too much money on the project？

M: Many experts have complained that the project has grown out of control and become far too expensive. But I look at it as more than a space station; I believe it's helping to foster international scientific cooperation. It's nice to see the scientists of the world working together to create a stepping-stone to the future.

(20)

A．It plans to send a probe to explore the moon.

B．It's NASA's most expensive project so far.

C．It's an ambitious project.

D．It's involved in the construction of the American space station.