题目内容
19．-When did the car accident happen？-It happened ____ a rainy night．（ ）
| A． | at | B． | on | C． | in |
分析 -车祸什么时间发生的？-发生在一个下雨的晚上．
解答 根据句中关键词a rainy night可知，一个下雨的晚上，英语上强调具体的某一天用介词on．结合选项，故选B．
点评 介词是考生经常会出错的考点，把同类词归纳起来特殊记忆：on+具体的某一天；in+月份；in+年份；at+时间点等等．
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