Question

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

Answer 1

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。