is expected according to the survey is that prices of houses will not go up any longer.

问题补充：

is expected, according to the survey, is that prices of houses will not go up any longer.

A. It

B. As

C. Which

D. What

答案：

A. It

B. As

C. Which

(答案→)D. What

解析：考查连词辨析。according to the survey是插入语。由于第二个is前面是主语从句，从句中缺少主语，故用what。