The reason______he failed the exam was______he had not worked hard.
A、
why. . . if
B、
why …that
C、
that…why
D、
why… what
【正确答案】
B
【答案解析】
解析:本题考查定语从句和表语从句。名词reason后的定语从句由why引导,表语从句由that引导,故本题选B。
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