Question

【题目】The reason _______ he has resigned is poor health.

A.in whichB.whereC.whyD.which

Answer 1

【答案】C

【解析】

考查定语从句。句意：他离职的原因是身体不好。这是一个定语从句，先行词为The reason，且先行词在从句中做原因状语，所以使用关系词why，故选C。