2026年7月托福机经套卷(第1套) - Listen to an Academic Talk / 2 Q2

原题

录音 1

Why do microbes matter when permafrost thaws?

AThey release greenhouse gases by decomposing organic material.

BThey prevent ice from melting.

CThey create new forests immediately.

DThey stop methane from forming.

正确答案：A

老师暂未填写解题思路。