【正确答案】 B

【答案解析】[解析] 6-10 W: We have with us in the studio today, Simon, an astronomer with an organization searching for intelligence and life in space. Simon, could you tell us something about it? M: Yes, of course. We're a scientific organization that started in 1959 to search for radio signals from intelligent life in space. W: So presumably you believe that there is intelligent life in space. M: No, I wouldn't say I believe that. But there may be intelligent life out there. It's certainly possible. The universe is so vast. Our sun is just one star among billions and it s a fact that many stars have their own planets orbiting around them. W: Really, I didn't know that. M: No, we've only recently discovered that. W: So why are you searching for radio signals? M: Because the distances in space are so great. It's unlikely that other life forms will ever visit us. If they exist, we're more likely to know from their radio signals. W: So, you don't believe all those stories about aliens visiting our planet? M: I'm afraid I don't. There's just no real evidence. But that doesn't mean there isn't other life in the universe. W: If there is life, what might it be like? M: Oh, it's hard to say. It might not have a form that we recognize. For example, on a planet where gravity is very strong, all life forms could be the size of microbes. W: Oh, really, fascinating. M: Even if we can't find life on distant stars, we might find simple forms of life in our own solar system. For example, we think there's ice on Mars. And where there's water, there's a possibility of life. W: That would be exciting. But what about these radio signals? Have you found anything interesting? M: I can't say we have. But we're going to keep looking. W: One final question that I've always wanted to ask an astronomer. Scientists now believe that the universe must have started with what's called "the big bang". M: Well, we're not 100% certain. But yes, we think that the universe could have begun with a huge explosion about 12 billon years ago. W: What I've always wanted to know is this: what began"the big bang"? How did it start? M: Are you asking me if I believe in God? We don't know how" the big bang" started. We just don't know. 由女士在对话开始的介绍“Simon，an astronomer…searching for intelligence and life in space”可知，Simon的工作是寻找太空智能和生命。故选B。

【正确答案】 A

【答案解析】在对话中，女士问道为何探索radio signals，男士表示如果其他生命造访地球we're more likely to know from their radio signals。即可证实外星人的存在。

【正确答案】 A

【答案解析】根据男士的回答I'm afraid I don't可知，他并不相信故事书中描述的外星人的故事。

【正确答案】 C

【答案解析】在生命形成的过程中，水的存在是不可或缺的，这也可从男士的话where there's water，there's a possibility of life中得知。故选C。

【正确答案】 B

【答案解析】有关大爆炸的解释中，男士说道the universe could have begun with a huge explosion about 12 billon years ago，所以它发生在大约120亿年前。故选B。