In spite of all has been said quite a lot of people are still uncertain about the price

问题补充：

In spite of all has been said, quite a lot of people are still uncertain about the prices of housing in China.

A. what

B. /

C. which

D. that

答案：

A. what

B. /

C. which

(答案→)D. that

解析：D考查定语从句。先行词为不定代词all，且在定语从句中作主语，所以用that引导定语从句，且不能省略。