2. 外语
  3. Except on official ______such as formal receptions, American society has a certain amount of informality.

Except on official ______such as formal receptions, American society has a certain amount of informality.

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问题 Except on official ______such as formal receptions, American society has a certain amount of informality.
选项 A、cases
B、situations
C、events
D、occasions
答案D
解析 occasion n.重大活动，盛会：时刻，场合；时机，机会(on official occasions在正式场合：on occasion[s]有时，间或；on such occasions在这样的场合；on many／several occasions有许多次/有好几次：on one occasion有一次；on the occasion of在……的时候，值……之际”)。case n．情况，事实；案件(注：case与in而不与on搭配)。situation n.形势，局面；环境，状况；地点，位置(一般与介词in相搭配)。event n.事件；(体育)比赛项目(与介词in而不与on搭配)。
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