解析：考查定语从句。句意：他们谈论了他们依然记得的中学的同学和事情。先行词为classmates and things，先行词表示人和物，关系代词用that而不用which。

　　8．The Sound of Music is the first English film __that__ I have ever seen.

　　解析：考查定语从句。句意：《音乐之声》是我看过的第一部英语电影。先行词是English film，前面有序数词the first修饰，故关系词用that而不用which。

　　9．Women __who__ drink more than two cups of coffee a day have a greater chance of having heart disease than those __who__ don't.

　　解析：考查定语从句。句意：一天喝两杯咖啡的妇女患心脏病的几率比不喝咖啡的妇女要高。此句中包含两个定语从句，且关系词在定语从句中都作主语，不能省略。

　　10．(2016·北京卷，22改编)I live next door to a couple __whose__ children often make a lot of noise.

　　解析：考查定语从句。a couple是先行词，这对夫妻的孩子很吵，children和couple是所属关系，故用whose作定语，相当于the children of whom，故填whose。

　　11．The increased monthly pay will benefit more than 23 million migrant workers __who/that__ are currently employed in Guangdong Province.

　　解析：考查定语从句。句意：月薪的增加将会让2,300多万在广东省打工的流动工人受益。先行词为more than 23 million migrant workers，从句中缺少主语，应用关系代词who/that。

　　12．Bears often hide themselves in places __that/which__ can't be found by hunters.

　　解析：考查定语从句。句意：熊经常把自己藏在猎人发现不了的地方。先行词是places，从句中缺少主语，故应用关系代词that或which。

　　13．The reason __that/which__ she gave for her being late was __that__ she was caught in a traffic jam.

解析：考查定语从句和表语从句。句意：她给出的迟到的原因是她遇到了交通堵塞。the reason是先行词，且在从句中作gave的宾语，故应用关系代词