【小站原创】官方真题Official9托福听力Lecture3文本+真题+答案解析

官方真题Official9托福听力Lecture3题目文本

Question 1 of 6

What is the lecture mainly about?

A. Reasons that geologists study lake fossils in desert regions.

B. A comparison of ancient and present-day lakes in desert environments.

C. Geological evidence for the formation of ancient sand dunes.

D. A hypothesis for how some ancient desert lakes formed.

Question 2 of 6

What is the professor's opinion about the conclusions of the recent study of the limestone formations in the Empty Quarter?

A. They have changed the way geologists study desert environments.

B. They contradict findings about similar desert lakes.

C. They explain the causes of monsoons in the desert.

D. They need to be confirmed by additional studies.

Question 3 of 6

According to the professor, what feature of the sand dunes made the formation of the lakes possible?

A. The degree of slope of the sides of the dunes.

B. The presence of clay and silt particles in the dunes.

C. The position of the dunes relative to the wind and rain.

D. The narrowness of the valleys between the dunes.

Question 4 of 6

How is it possible to determine in which rainy period a lake was formed?Click on 2 answers.

A. By examining the location of the lake bed.

B. By measuring the amount of sand covering the lake bed.

C. By examining the color of the limestone formation.

D. By identifying the types of fossils found in the limestone.

Question 5 of 6

What does the professor imply about the lack of water buffalo and hippopotamus fossils in the more recent lakes?

A. The level of water in the lakes was not sufficient for these animals.

B. The bottoms of the lakes were too sandy for these animals to stand in.

C. The location of the lakes made them too difficult of these animals to reach.

D. The vegetation near the lakes did not attract these animals.

Question 6 of 6

What possible explanation does the professor give for the apparent absence of fish in the most ancient lakes?

A. The presence of predators.

B. Lack of appropriate food.

C. Lack of suitable water.

D. Extreme desert temperatures.

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