The survey shows that ______ we are enjoying less and less good sleep, rates of heart diseases have ...
2022-11-22 02:09:23 87次 2013-2014学年江西省宜春市高三模拟考试英语试卷（解析版） 单项填空 反馈错误 加入收藏 正确率 : 100%
题目内容：
The survey shows that ______ we are enjoying less and less good sleep, rates of heart diseases have risen rapidly．
A． while B． although C． if only D． as though
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