题目内容
2．Do you know ______in Japan？（ ）| A． | when nuclear（核） accidents happened | |
| B． | when did nuclear accidents happen | |
| C． | when nuclear accidents happen | |
| D． | when do nuclear accidents happen |
分析 你知道日本的核泄漏事件是什么时候发生的吗？
解答 答案：A；根据句中的Do you know可知后面应用宾语从句；不管哪种句式充当宾语从句都要用陈述句语序，因日本的核泄漏事件发生在过去，故用过去时；故选A．
点评 掌握宾语从句的表达方式，结合句意便可熟练作答．
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