【2012山东卷】23. Maria has written two novels, both of ________ have been made into television series.
A. them B. that
C. which D. what
【答案】
【解析】此处先行词是two novels，后面是一个非限制性定语从句且介词前置，因此用both of which引导。句意：Maria写了两部小说，两部都被拍成了电视剧。
【考点】考查非限制性定语从句的用法。
【2012福建卷】23. The air quality in the city, ________is shown in the report, has improved over the past two months.
A. that B. it C. as D. what
【考点】本题考查定语从句的引导词
