Question 9 is based on the conversation you have just heard.

M: Watch it, Mary!

W: What’s the matter?

M: This is the end of the road. There’s a river just beyond those trees.

W: Another river? I’ve never seen so many rivers anywhere in my life. Let’s go take a look.

M: (9) This river is wide and deep.

W: Yeah, you’re sure right about that. We aren’t going to be able to put any ordinary bridge across this one.

M: (10) Do we have to get the trucks over to the other side?

W: That’s what they told me.

M: What about a ferry?

W: That’s what we’ll have to do if I can’t think of anything else, but it’ll really slow down the operation.

M: What about flying the equipment over in a helicopter?

W: We’d have to take the big trucks apart and then put them back together again, slower than a ferry and a lot more expensive.

M: What’re you going to do then?

W: Well, I’m beginning to get an idea. Have you ever heard of a pontoon bridge?

M: No. What’s that?

W: It’s a bridge that’s supported on boats. The boats are anchored at regular distances and they carry the weight of the bridge.

M: (11) I guess that might work if you have enough boats, but won’t it take a long time to build them? W: Maybe we can buy them.

M: Buy them?

W: From some of the native villagers. I’ve seen some fairly big rowing boats.

M: I don’t know about that? Most of those boats are pretty light.

W: Yeah, but if we tied up a bunch of them together, they might support a road. Let’s find out anyhow.

M: OK.

9. What do the speakers say about the river beyond the trees?

正确答案：C

解析：对话中男士提到，这条河又宽又深。