[originaltext]M: It’s good to see you back. How was your trip to Arizona? Did y

游客2024-01-22  19

问题  
M: It’s good to see you back. How was your trip to Arizona? Did you see the Grand Canyon?
W:(9)Yes, it was fantastic. Now I know why it is listed together with the Nile River as one of the greatest natural wonders of the world. Here, are you interested in seeing the pictures I took there?
M: Oh, what a splendid view! It is even bigger than I had imagined. I remember reading about the Grand Canyon and(8)I think it said that it was formed suddenly when the outer crust of the earth split open during an earthquake.
W:(8)Well, not that quickly. Look, here is the picture of the Colorado River. See way down at the bottom of the canyon? That river and its branches have been wearing the canyon floor away for ten million years.
M:(10)Then the canyon is the result of soil losses. I’ll bet geologists have made some interesting discoveries there.
W: Not only the geologists, archaeologists have also found the bones of some extinct animals in caves in the canyon walls. In a cave 140 feet above the river, they found driftwood that dated back as far as 37 000 years.
M:(11)That means the river must have been 140 feet higher when it carried the driftwood into the cave.
W: It’s very possible, but of course who knows. The Grand Canyon is full of mysteries. Wouldn’t you like to go to Arizona some day?
M: You bet I would.
8. What are the two speakers mainly talking about?
9. How was the woman’s trip to Arizona?
10. What’s the main cause of the Grand Canyon’s formation according to the conversation?
11. What does the driftwood found in the cave indicate?

选项 A、The canyon is more than 140 feet in height.
B、The canyon was formed 37 000 years ago.
C、Colorado River was once more than 140 feet higher than its water level today.
D、Animals could make fire from wood thousands of years ago.

答案 C

解析 本题问的是在山洞中发现的漂流木表明什么。对话后半部分女士提到地质学家在大峡谷岩壁的山洞里发现了灭绝动物的骨头,在科罗拉多河上面140多英尺的山洞里发现了37 000年前的漂流木,因此男士下结论说,那意味着科罗拉多河把漂流木带进山洞的时候的水位要比现在高出140多英尺。
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