Narrator: Listen to part of a lecture in a biology class. Professor: Now, many people assume that all bats use echolocation to navigate and hunt. But that's not entirely true. Fruit bats, especially those in the Old World, rely heavily on vision and smell. In fact, their eyes are quite large and adapted for low-light conditions. Take the flying fox, for example. It has a keen sense of smell to locate ripe fruit, and its eyesight is good enough to see in dim twilight. Interestingly, some fruit bats also produce a kind of click with their wings, which helps them avoid obstacles in dense forests—but this is not the same as the high-frequency echolocation used by insect-eating bats. So, while echolocation is a remarkable adaptation, it's not universal among bats. The diversity of sensory strategies is a key point in their evolution. Any questions?
❓ 문제 What is the main point the professor makes about fruit bats?
A. A. They use echolocation more than vision.
B. B. They rely on vision and smell rather than echolocation.
C. C. They cannot see in low-light conditions.
D. D. They are the only bats that produce wing clicks.
✅ 정답
B. They rely on vision and smell rather than echolocation.
TOEFL Listening Tips
Skim the questions first to predict the content
Watch for signal words in lectures and conversations (however, actually, in fact)
For main idea questions, focus on the beginning; for detail questions, focus on examples and data
For attitude questions, pay attention to the speaker's tone and word choice
Take notes on keywords; don't try to write down every word