第3练 阅读＋完形＋语法填空
Ⅰ.阅读理解
A
体裁：科普文 话题：健康生活 词数：350 时间：6′
Sleeping in a room with too much light has been linked to an increased risk of gaining weight，a study shows.A team at the Institute of Cancer Research in London found women had larger waistlines if their bedroom was “light enough to see across” at night.However，they say there is not enough evidence to advise people to buy thicker curtains or turn off lights.
The women were asked to rate the amount of light in their bedrooms at night as：Light enough to read.Light enough to see across the room，but not read.Light enough to see your hand in front of you，but not across the room.Too dark to see your hand or you wear a mask.Their answers were compared to several measures (程度) of obesity.These measures were all higher in women with lighter rooms.
Prof Anthony Swerdlow of the Institute of Cancer Research told the BBC：“In this very large group of people there is an association between reported light exposure at night and overweight and obesity.But there is not enough evidence to know if making your room darker would make any difference to your weight.There might be other explanations for the association，but the findings are interesting enough to guarantee further scientific investigation.”
