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    精英家教网 > 高中英语 > 题目详情
    The survey shows that ______ we are enjoying less and less good sleep, rates of heart diseases have risen rapidly．
    A．whileB．although C．if onlyD．as though
    A
    句意：调查显示当我们正在享受着越来越少的好睡眠时，心脏病的发病率却迅速地上升。A. while当…的时候；和…同时；B. although尽管，虽然；   C. if only 只要，要是……多好；D. as though仿佛，好像；由句意可知选A。
    考点: 考查连词和代词的用法。
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