问题
选择题
The most widely accepted theory about the beginning of drama is based on the concept ______ drama evolved from ritual.
A．which
B．that
C．when
D．as
答案
答案：B
四个选项分别表示哪一个、那个、什么时候和随着。根据前置词concept内容不可数名词，可知选B,戏剧由宗教仪式发展而成的内容。