单选题 You will hear some dialogues or monologues. Before listening to
each one, you will have time to read the questions related to it. While
listening, answer each question by choosing A, B, C or D. After listening, you
will have time to read your answer. You will hear each piece ONLY ONCE.
Questions 11～14 are based on the following
conversation.
单选题
Where has the woman been?
【正确答案】
C
【答案解析】[听力原文]11-14
M: It's good to see you back. How was your trip to Arizona? Did you see the Grand Canyon?
W: Yes, it was fantastic. Now I know why this is together with a wild river as one of the great natural wonders of the world. Here, want to see the pictures I took?
M: Oh, what a view! It's even bigger than I imagined. I remember reading about the Grand Canyon. I think it said that it was formed suddenly when the earth cross-split during an earthquake.
W: Well, not that quickly. Look, here is a picture of the Colorado River. She wears down the body of the canyon. That river and its tributary have been wearing away the canyon floor for over 10 million years.
M: Then the canyon is the result of soil erosion. I bet geologists have made some interesting discoveries there.
W: Not only the geologists, archeologists have found the bones of ancient animals in caves and canyon walls. In a cave 140 feet above the river, they found driftwood that dates back as far as 37000 years.
M: That means, the river must have been 140 feet higher to carry the wood 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!
单选题
What type of scientific discoveries does the woman mainly talk about?
【正确答案】
C
【答案解析】
单选题
Where did the woman say the driftwood was found?