The opening ceremony is to be held in the lecture hall this afternoon can seat 400 peopl

问题补充：

The opening ceremony is to be held in the lecture hall this afternoon, can seat 400 people.

A. where

B. when

C. that

D. which

答案：

A. where

B. when

C. that

(答案→)D. which

解析：考查定语从句的用法。由于定语从句缺少主语所以用which引导定语从句并且在从句中做了主语