Question

Our earth is getting warmer and warmer. It is time for us to_____ the emission(排放) of CO2.

A．break down

B．cut in

C．cut down

D．cut off

Answer 1

C

试题分析：考查短语辨析。A. break down抛锚；B. cut in插嘴；C. cut down消减；D. cut off切断。句意：我们的地球变得越来越暖，是该我们消减二氧化碳排放的时候了。故C正确。