题目内容：
The discount houses were first established in that period of time ________ people‘s purchasing power was low. A. which B. that C. when D. where
参考答案：
选择题：Thediscounthouseswerefirstestablishedinthatperiodoftime________people‘spurchasin
- 题目分类：习题答案
- 题目类型：选择题
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