【题目】The reason _____he was absent was_______ he went shopping in town that day.
A. that ; why B. why ;why
C. why; that D. that; because
在线课程【答案】C
【解析】考查定语从句和表语从句，句意：他缺席的原因是那天去城里购物了，第一处关系副词why引导定语从句修饰先行词The reason，在定语从句中充当原因状语，故选why。第二处是表语从句，be动词之后he went shopping in town that day是个完整的句子，连词that只起连接作用，无实际意义，故选that。
故选C。