Question

Before the conference, a new problem came up __________ could speak on behalf of our group.

A．that

B．who

C．which

D．how

Answer 1

B

考查名词性从句。句中who引导宾语从句，在从句中作主语。句意：在会议之前，一个新的问题出现了，谁能够代表我们组发言。