The road conditions there turned out to be very good was more than we could expect.A. itB

问题补充：

The road conditions there turned out to be very good， was more than we could expect.

A. it

B. what

C. which

D. that

答案：

A. it

B. what

C. which

D. that

解析：C

解析空格前为逗号，故需用关系代词作动词was的主语。what不引导定语从句；that不引导非限制性定语从句；it不是连词；故只有C项正确。