都可以.它有“时机”和“场合”两种意思.我分别给你两个example:1,i still remember the occasion where i ever kissed her2,i will never miss the occasion when i can kiss her(我绝不会错过这个可以吻她的时机)...这个例子真牛x-_-那就采纳咯。it is my pleasure to help you.kiss god.问题是我只是感叹，问题没有解决，看我的补充。我大概记得你做过的那套题。(2008，山东高考)occasions are quite rare____ i have the time to spend a time with my kids D.when (2009,福建高考)it is helpful to put children in a occasion ___they can see themselves differently.D.where.一个选c一个选d。你只要理解句子意思就简单了。