2026年5月托福机经套卷(第2套) - Listen to an Academic Talk Q4

原题

录音 1

What does the speaker emphasize about beavers in Yellowstone?

ATheir presence benefits many other animal species.

BThey are often preyed on by wolves.

CThey often damage vegetation.

DThey compete with elk for food.

正确答案：A

老师暂未填写解题思路。