1.【2013届苏锡常镇四市高三教学情况调研（一）】34. Nowadays many parents are trying to either prevent their children from failure, or protect them from the knowledge ________ they have failed.
A. that B. when C. where D. which
【答案】A
【解析】句意：现如今，许多父母一直致力于要么防止他们的孩子失败，要么不让他们知道他们已经失败的事实以免他们受伤。这里是knowledge后面接的同位语从句，从句完整不缺成分，故选that.
本题考查名词性从句的连接词。
【考点定位】考查名词性从句的连接词。
2.【2013届盐城市高三二模】34. It is difficult to tell exactly ____ the saying began, but it is probable that it was in the the theater or movie industry.
A. where B. when C. why D. that
【答案】A
【解析】tell exactly后边是一个宾语从句，宾语从句中主语谓语都有，究竟缺的是时间还是地点，but后边就有很清楚的提示——it was in the theater or movie industry。由这个提示得知，难以判断的是谚语的出处（where）。因此选A。
【句意】很难准确判断这个谚语是从哪里开始的，但很有可能是从戏剧电影业开始
【考点定位】本题考查宾语从句中的疑问词。
3.【2013届江苏南京市二模】34. After ________seemed n hopeless wait，four coal-miners trapped in the mine for 125 hours were finally rescued m Heilongjiang Province.
A. when B. that C. it D. what
【答案】D
