题目内容：
Much of the debate on an ongoing society in China has focused on the extended families__________ the number of "empty-nets" is growing by the millions every year．
A.that B.when C.where D.which
参考答案：
答案解析：
选择题：Much of the debate on an ongoing society in China has focused on the extended...
- 题目分类： 英语学科知识与教学能力
- 题目类型：选择题
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