问题
选择题
Later they discovered, ____ was news to him, that Pamela was the headmaster’s daughter.
A．that
B．which
C．what
D．who
答案
答案：C
what＝the thing that。若用which引导非限制性定语从句，which指代整个主句的意思，则which不能放在主句之前，或插入到主句中间，只能放在主句之后。
