3. TOEFL Listening

Biology Question 1
What is the lecture mainly about? 

• A. How animals emit ultrasonic pulses
• B. How bats use acoustical signals
• C. A comparison of echolocation and radar
• D. Variations among bats in the use of ultrasound

Biology Question 2
Why does the professor decide NOT to add more information to the diagram on the board?

• A. She wants students to complete the diagram themselves as an assignment
• B. She needs to look up some information in order to complete the diagram accurately
• C. The additional information is not relevant to the topic that she wants to discuss next
• D. Students already have the additional information in their textbook

Biology Question 3(1). 
According to the professor, what are two ways in which a moth might react when it detects the presence of a bat? Choose 2 answers

• A. The moth might stop beating its wings
• B. The moth might emit high-frequency sounds
• C. The moth might leave the area
• D. The moth might change its color to match its surroundings

Biology Question 3(2). 
According to the professor, what are two ways in which a moth might react when it detects the presence of a bat? Choose 2 answers

• A. The moth might stop beating its wings
• B. The moth might emit high-frequency sounds
• C. The moth might leave the area
• D. The moth might change its color to match its surroundings

Biology Question 4. 
What surprising information did a recent experiment reveal about lesser spear-nosed bats?

• A. They filter out echoes from some types of trees
• B. They can analyze echoes from stationary objects with complex surfaces
• C. They cannot analyze "jagged" echoes
• D. They cannot analyze echoes from certain types of small moving objects

Biology Question 5
According to the professor, why does a pine tree produce a "smooth" echo?

• A. Because it has a smooth trunk
• B. Because it has large branches spaced at regular intervals
• C. Because it has many small, densely packed needles
• D. Because it remains staionary in all types of weather

Biology Question 6
Listen to track 4

• A. to answer a question that Carol asked
• B. To correct a statement that Carol made
• C. To praise Carol for an example that she gave
• D. To give an example of principle that Carol stated

History Question 1 
What is the lecture mainly about?

• A. Political events that led to the invention of eyeglasses
• B. A comparison of attitude toward vision correction in Europe and China
• C. The relationship between the printing press and literacy
• D. An overview of vision correction over time

History Question 2
According to the professor, what was an advantage of using clear glass instead of quartz to make reading stones?

• A. Clear glass was easier to find than quartz
• B. Clear glass was easier to cut to the appropriate size
• C. Clear glass magnified the letters more than quartz did
• D. Clear glass was less expensive than quartz

History Question 3.
What does the professor imply about the invention of eyeglasses?

• A. Its historical records are more detailed than those of other inventions
• B. It had little impact on social attitudes toward vision correction
• C. Its occurrence in different places at approximately the same time is not unusual
• D. It contributed to a substantial increase in the number of literate people