____(when/while) i sleep,the earthquake _____(happen)

____(when/while) i sleep,the earthquake _____(happen) While he ____(work) on the comeputer,the earthquake happen. What you when the earthquake happen When did the earthquake of Wenchuan happen When the earthquake _____(burst) out,people ___(sleep) as us 朗读下列句子,体会when 和while的不同.1、 the earthquake happened while i w —When did the terrible earthquake in Japan happen? — When did the terrible earthquake in Japan happen? The earthquake ____(happen) in Yushu on April 14,2010 When he gets tired,he ____(sleep)for a while why did the earthquake happen? I have on idea what ___(happen) while I was sleep