5．Five reasons your scale might be wrong
1．You weigh yourself on different days each week．
In a Cornell university study published last year，researchers analyzed the food weight diaries that 80people kept for up to a year．They found that people's weight changed considerably throughout the week．（36）G Keep weigh-in days consistent for a more accurate assessment．
2．（37）A
File this one under"Yes，scientists have actually studied this．"When University of North Dakota researches weighed people with and without clothes at various times of the year，they found that men can reduce 2.5pounds for their clothing and women can reduce around two pounds，on average．
3．You don't take muscle gain into consideration．
You've heard that muscle is denser （密度大的） than fat．（38）D If you start a strength-training routine，the number on the scale （秤） might not change，but you could still lost inches and drop a clothing size or two．
4．You just drank a lot of water．
It's called water weight for a reason：Drinking one pound of water can translate to about one pound of weight．So if you stand on the scale soon after drinking an entire water bottle's worth，you might not like what you see．（39）B
5．You weigh yourself after hard exercise．
Compared with water weight，if you weigh in after a tiring cycling class，you may lose weight temporarily because you work up a good sweat．（40）E
A．You miscalculate your clothing．
B．But don't worry，it's just a temporary gain．
C．Salty foods cause your body to save extra water．
D．In fact，it takes up only about a third as much space．
E．Jump on the scale if you need to improve．
F．You should be aware of how much water you have drunk．
G．Many people were heaviest on Mondays and lightest on Fridays．
分析 本文是说明文．文章介绍了秤上显示的体重与实际体重不符的五个原因．
解答 GADBE
36．G 上下文语境．根据They found that people's weight changed considerably throughout the week 可知"很多人周一最重、周五最 轻"与本空上一句"人们的体重在一周内变化很大"相符，故选G．
37．A 上下文语境．根据下文的 men can reduce 2.5 pounds for their clothing and women can reduce around two pounds …可 知，称体重时穿不穿衣服会影响结果，因此造成秤上显示的体重与实际 体重不符的一个原因就是"你对衣服 （的重量） 计算有误'，故选A．
38．D 上下文语境．根据本空上一句内容You've heard that muscle is denser （密度大的） than fat．可知，肌肉的密度比脂肪的大，因此同等重量的肌肉"体积只有脂肪的三分之一"．D项中的it指代muscle．
39．B 上下文语境．根据前句So if you stand on the scale soon after drinking an entire water bottle's worth，you might not like what you see可知，如果你喝水后去称体重，你看到的可能不是你的实际体重，但是别担心，这只是暂时的重量，故选B．
40．E 上下文语境．根据本段内容可知，刚锻炼完，由于出汗较多，体重会暂时减轻，因此"如果你需要增加自信"，这个时候称 体重无疑是最佳时机，故选E．
点评 本文是一篇选句填空阅读，题目主要考查上下文内容联系以及文章内容理解．做题时学生应仔细阅读原文，把握文章主要内容，联系文章上下文内容并结合所给选项含义，从中选出正确答案，一定要做到有理有据，切忌胡乱猜测
