爱华网occasion 在定语从句中作先行词时，后面用关系副词when还是where?
occasion在表示：“aparticular time or instance of an event（特定的）时刻；场合”时，定语从句引导词用when；当表示：“aspecial or noteworthy event, ceremony, orcelebration（仪式、庆典等）重大场合”时，定语从句引导词用where。（新牛津英汉双解大词典）
例句：
1. In hardtimes, the Spring Festival was the only occasion where a familyth rew off the old attire and put on new clothes specially made forthe festival.
2. Describe anoccasion when you had to give a presentation to anaudience.
例题：
D 1.Occasions are quite rare ____ I have the time to spend a day withmy kids.
A. whoB. whichC. why D.when08山东
