【题目】The conference has been held to discuss the ________ of global warming on people's lives all over the world. ( )
A.importance
B.effects
C.protection
D.attitudes

【答案】B
【解析】A．importance重要性；B．effects影响；C．protection保护；D．attitudes态度；句意：已经召开了会议讨论全球气候变暖对全世界人们生活的影响。根据句意，故选B。.