【题目】The weather turned out to be very good, _______ was more than we could expect.
A.what
B.which
C.that
D.It

【答案】B
【解析】考查定语从句。which可代替句子，用于非限定性定语从句，而what不可。That不能用于非限定性定语从句，it不为连词，使由逗号连接的两个句子并在一起在英语语法上行不通。故选B。