the train was crowded and I had to get into a carriage __already seven other people.A when there wereB which there wereC that there wereD where there were为什么选D?

Question

the train was crowded and I had to get into a carriage __already seven other people.
A when there were
B which there were
C that there were
D where there were
为什么选D?

Answer 1

这个题是考察定语从句的用法,后面从句不缺少任何成分,应选择添加一个状语成分,而且它是对地点名词进行解释,所以应选D