occasion 在定語從句中作先行詞時,后面用關系副詞when還是where?

occasion在表示:“aparticular time or instance of an event(特定的)時刻;場合”時,定語從句引導詞用when;當表示:“aspecial or noteworthy event, ceremony, orcelebration(儀式、慶典等)重大場合”時,定語從句引導詞用where。(新牛津英漢雙解大詞典)
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.
例題:
D 1.Occasions are quite rare ____ I have the time to spend a day withmy kids.
A. whoB. whichC. why D.when08山東
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