267.
M: Miss Stewart, I wonder if you could give me some advice about where to go and what to see in the city?
W: How many days do you have, Mr. Ross?
M: We have three more days. We're leaving on Friday.
W: Have you taken a bus tour? That's the best way to get to know the city.
M: Not yet. But we hear that it's worth doing.
W: Absolutely. And I think you should really visit the science museum while you are here. It's fascinating. Have you been there yet?
M: No, we're going there tomorrow afternoon.
W: Well, you'll love it.
M: I'm sure we will.
W: What about the zoo? Have you been there yet?
M: Oh, yes. That was lovely. It's one of the nicest zoos I've ever seen. Even better than San Diego's.
W: And if you're interested in art, you should visit the National Art Gallery. It has a famous collections of Italian paintings.
M: Yes. I've read about that. We should try to get there while we are here.
W: And don't forget to try some of the local restaurants. The seafood is great here.
M: Yes, it certainly is! Last night we had fantastic clams（蛤）. Say, would you like to join us for dinner tonight? My wife would like very much to meet you.
W: That'd be lovely. Thank you.

答案解析：
(1) 正确答案为B。根据女子说I think you should really visit the science museum.我想你真应该去参观科学博物馆。和男子回答we're going there tomorrow afternoon.我们明天下午会去。可知，男子明天将去科学博物馆，因此B项正确。
(2) 正确答案为A。根据男子说Say, would you like to join us for dinner tonight? 你今晚想和我们一起共进晚餐吗？和女子回答That'd be lovely. Thank you. 那太好了，谢谢你。可知，女子今天要和男子共进晚餐，因此A项。
(3) 正确答案为C。根据We have three more days. We're leaving on Friday.我们还有三天时间。我们周五离开。可知，男子将在本周五离开，因此C项。