Question

________ global temperatures rising, the UN Climate Change Conference was held in Cancun（坎昆）, Mexico last year．

A．Prevented	B．Preventing
C．Having prevented	D．To prevent

Answer 1

D

考查不定时做目的状语。 为了防止全球气温增长，去年联合国在墨西哥坎昆召开了气候大会。