Question

The first thing           we should do is to tell him the news.

A． who

B．which

C．that

D．whom

Answer 1

C

解析試題分析：句意：我們應該做的第一件事情就是要告訴他這個消息。定語從句的先行詞受到序數詞的修飾時，關系代詞只能用that來引導；故選C。
考點：考查定語從句。