2026年5月托福机经套卷(第2套)Listen to an Academic Talk4 道题

Listen to an Academic Talk

共用材料

共用录音 1

What was the cause for the near disappearance of sea otters from waters along the United States Pacific coast?

ADisease

BOverhunting by humans

CCompetition from other species

DHabitat destruction

查看答案

正确答案：B

According to the speaker, what happened to kelp forests when sea otters almost disappeared?

AThey became overgrown and crowded out other marine life.

BThey returned to their original size.

CThey were destroyed by expanding populations of sea urchins.

DThey began to attract species that the otters had previously preyed on.

查看答案

正确答案：C

How did elk behavior change after wolves were reintroduced to Yellowstone National Park?

AElk began to be more active at night.

BElk began to form larger groups.

CElk began to feed less near streams.

DElk began to hide among willow and aspen trees.

查看答案

正确答案：C

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.

查看答案

正确答案：A