those who had learned from us now excelledus was a real challenge. A. That B. Wh

____ those who had learned from us now excelled（胜过）us was a real challenge. A. That　 B. What　 C. People　 D. The classes

试题答案

A

that引导主语从句，was是主句的谓语动词；在主语从句中those是主语，excelled作谓语，who had learned from us是定语从句修饰先行词those。