题目内容
山西省太原市2011届高三基础知识测试英语
The boy was wandering through the street _____ a bike hit him.
A.when B.once C.while D.as
A
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山西省太原市2011届高三基础知识测试英语
The boy was wandering through the street _____ a bike hit him.
A.when B.once C.while D.as
A