题目内容
My brother was reading a book I came in.
A. because B. since C. as D. though
C 【解析】 句意:当我进来的时候我的弟弟正在读书。A. because因为; B. since自从,既然; C. as 当……时候; D. though虽然,尽管。若从句是一个短暂性动作(如:came),主句是一个持续性动作(如:was reading a book),可用 as / when 但不用 while:It was raining hard when [as] we ar...
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