My calculations were based on the that house prices would remain steady.
A. theory
B. assumption
C. procedure
D. regulation
网友回答
A. theory
(答案→)B. assumption
C. procedure
D. regulation
解析：考查名词：A. theory理论B. assumption假设C. procedure 程序D. regulation规则，句意：我的计算是以房价保持平稳的假设为基础的。选B。