1.(2019·全国卷Ⅱ，62)Now Irene Astbury works from 9 am to 5 pm daily at the pet shop in Macclesfield, ________ she opened with her late husband Les.
答案：which 分析句子结构可知，逗号后是非限制性定语从句，the pet shop是先行词，定语从句中缺少opened的宾语，故用which引导非限制性定语从句。
2．(2019·全国卷Ⅲ，64)They were well trained by their masters ________ had great experience with caring for these animals.
答案：who 分析句子结构可知，所填词引导定语从句，修饰指人的先行词their masters，且在从句中作主语，故填关系代词who。
3．(2019·浙江高考，58)On the edge of the jacket, there is a piece of cloth ________ gives off light in the dark.
答案：that/which 此处引导定语从句来修饰先行词a piece of cloth，而且在从句中作主语，所以用that或which来引导。
4．(2019·江苏高考，21)We have entered into an age ________ dreams have the best chance of coming true.
答案：when 句意：我们已经进入了一个梦想最有可能实现的时代。分析句子结构可知，空格处引导定语从句，先行词是表示时间的名词an age，在从句中作时间状语，故用关系副词when引导定语从句。
