题目内容
The reason _____ they held a party was _____ it was Sue’s birthday.
A. why; because B. why; that
C. that; that D. that; because
B
【解析】
试题分析:考查定语从句和表语从句。句意:他们举办晚会的原因是给Sue过生日。the reason是先行词,定语从句不缺成分,用why引导定语从句,排除C、D;was后跟表语从句,表语从句不缺少成分,用that引导,排除D,The reason why...is/was that...“......的原因是......”,可以看作固定句型,故选B。
考点:考查定语从句和表语从句
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