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：調查顯示當我們正在享受著越來越少的好睡眠時，心臟病的發病率卻迅速地上升。A. while當…的時候；和…同時；B. although盡管，雖然；   C. if only 只要，要是……多好；D. as though仿佛，好像；由句意可知選A。
考點: 考查連詞和代詞的用法。