Many nations have promised to reduce greenhouse gas emissions, but are falling short of the ________

Many nations have promised to reduce greenhouse gas emissions, but are falling short of the ________ reduction of 25 to 40 percent of 1990 levels.
A. target B. option C. profit D. refund
【答案】A
【解析】
【详解】考查名词词义辨析。句意：许多国家承诺减少温室气体的排放，但是还没有达到1990年减排25%到40%的目标。A. target目标；B. option选项；C. profit利益；D. refund退款。通过reduction of 25 to 40 percent of 1990 levels可知每个国家曾经设立了减排目标，所以用target(目标)来满足句意。故此题选A。