ent to that it Р A B Р would affect society could not have been foreseen.Р C DР分析:B错,应改为which。The extent to which, 介词加which(引导定语从句),影响社会的程度没有被预见Р(六) 定语从句的特殊省略РReason后面有定语从句,中间往往省略why, РTime后面有定语从句,中间往往省略whenР I do remember the time I heard the sweetest voice in the wild world.Рway后面有定语从句,中间省略了in whichР例:Research on pain has been neglected, although the mainly Р A B Р reason people take medicine is to relieve pain.Р C DР分析:B错,应改为main。mainly为副词,不能修饰后面的名词,故改为形容词main。句子中people take medicine修饰reason,定语从句引导词被省略Рmercial expansion from city to suburb has Р affected the way people in the United States----.Р (A) living and workingР (B) they live and work Р (C) live and workР (D) to live and to workР分析:选择C, the way people....影响了人们生活和工作的方式。