Who are the ladies that________our school now．？
A.is visiting
B.are visiting
C.visits
D.visit
网友回答
B解析分析：此处that引出了一个定语从句，在定语从句中是主语，指定语从句所修饰的名词the ladies，因此这里的that要看成复数，所以要在are visiting和visit中来决定。根据句子的意思应该选B项are visiting．(延伸)定语从句的引出词who，that，which如果是定语从句的主语的话，判断是单数还是复数就要看定语从句所修饰的名词(即“先行词”)的数，如：He lives in the house which(that)is opposite ours．(单数)The shops which (that)are located on Nanjing Road are full of people all the yearround．(复数)