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

考查名詞性從句。句中who引導賓語從句，在從句中作主語。句意：在會議之前，一個新的問題出現了，誰能夠代表我們組發言。