According to Frank O'donnell, the effect of the enforcement of the Clean Air Act could ______. A.exceed Mr. Obama's economic budget greatly B.be overestimated by some environmental group C.hetp U. S. government get closer to its climate goal D.solve the climate problem on greenhouse gases
A.A.exceed B.be C.hetp D.solve
【参考答案】
C 解析：根据题干关键词Frank O'donnell, Clean Air Act定位到原文第十一段第一句：“......