Cell Phone Messages and Sleep Quality

Everyone loves to get a“goodnight" text. However, sending too many messages before ___31___ may affect your sleep quality.

In a recent ___32___, 83 college students responded to a(n)___33___ survey about their sleep quality. They were asked to report the___34___ number of text messages they send and ___35___ on any given day. Sure___36___, researchers found that the more people text, the less sleep they get. Why? People often sleep too___37___ to their phones. The ringing or buzzing(嗡嗡声) of lat-night messages might___38___them out of their sleep. Worse still, people may feel pressured to respond___39___ to messages even if they come in the middle of the night.

If you do not want to___40___our sleep, turn your phone off. If you don't give your phone a rest, you won't get any, either.

A. Online  B. knock  C. slowly   D. enough   E. bedtime

F. Average  G. receive  H. Close  I. far       J. study  

K. Immediately   L. ruin