I admire my math teacher very much. There were very few occasion

I admire my math teacher very much. There were very few occasions ( ) she stopped working because of illness.

A、

when

B、

where

C、

which

D、

that

【正确答案】：A
【题目解析】：

本题考查定语从句连接词的使用。
分析句子结构，先行词“occasions…的时候”是表示时间的名词，连接词需使用关系副词when充当时间状语，故选A。
句意：我非常钦佩我的数学老师，她很少因为生病而停止工作。