问题补充：
is expected, according to the online survey, is that housing prices can’t go up any more.
A. Which
B. What
C. It
D. As
答案：
A. Which
(答案→)B. What
C. It
D. As
解析：考查由what引导的名词性从句做主语。句意：根据网上调查，我们所预测的就是房价不会再上涨了。所以选B。
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