The meeting,-----was held in our school ,was a great success.A which B work C where D what

题目

The meeting,-----was held in our school ,was a great success.A which B work C where D what
为什么选呢.

答案

A
原因是,此处要选个可以引导定语从句的助词,并且是在从句中做主语的
因此,可以引导定语从句的,选项中只有A和C,但是有必须是可以做主语的
因此答案就出来啦：A