A、One hour. B、Two hours. C、Three hours. D、Four hours. B对话中男士说：“船1点出发，大概3点返回。”而且女士也两次分别提到了two-hour和two hours。故选B。

M: Hey, Linda! Long time no see! I heard that you’re going on a boat trip this afternoon.
W: Yes, I am, and I can’t wait! I’ve never been up close to a whale before. Do you think we’ll see many whales today? [1] Cindy told me she didn’t see anything last time, so I think it really depends on luck. What would you say?
M: Well, I think we should have better luck, because this is the best time of the year to see whales.
W: [2] Why is winter the best time of the year to see whales?
M: [3] At this time of the year, the whales are heading south from Alaska to warmer water for the winter. Then they’11 return to Alaska before summer.
W: So we can see lots of whales busy traveling at this particular point. By the way, do you know how long the boat trip is? Cindy said it was like quite a long day, and I think it was probably because she didn’t see anything.
M: [4-1] The boat leaves at one o’clock and returns at about three o’clock. So you may want to get to the fisherman’s wharf before one.
W: [4-2] Only a two-hour trip?
M: Yes, the whale-watching travel is pretty close to shore, so we don’t need to go out very far in the ocean to see them.
W: [4-3] I guess two hours is probably enough. I’ve never actually been out on the ocean in a boat, and I’m not really sure I’ll like it. OK, then, I will see you this afternoon!
1. What happened to Cindy according to the woman?
2. When is the best season to see whales according to the man?
3. Which direction will the whales head for in winter?
4. How long will the whale-watching trip last?