问题补充：
单选题LawshavebeenpassedinpartsofSouthAfrica,_____governmentseithertaxshopperswhouseplasticbagsorfinecompaniesthathandthemout.A.whichB.whereC.asD.what
答案：
B解析考查定语从句关系词的选择。根据句子结构可知该句为非限制性定语从句，先行词parts of South Africa 在定语从句governments either tax shoppers who use plastic bags or fine companies that hand them out中作地点状语。故选择where=in which
