题目内容
13．Enough sleep is important to health．The amount of sleep （61）needed（need） depends on the age of the person and the conditions in（62）whichsleep takes place．The young may need more sleep than（63）theold，but usually eight hours are enough for the health of grown-ups．Some can do with（64）lessthan this amount，but others may need more．Every person knows his own need．（65）Itis then a matter of good judgment to satisfy his need．Sleep should always be enough to make one bring back his（66）strength（strong） and get ready for a day's work．Fresh air is necessary to sound sleep．So it is not without reason for some people to think that it is practicable to sleep（67）in the open air．A bath at bedtime，（68）neither hot nor cool but of body temperature，may be helpful（69）to sleep．Sleep-producing drug should never be taken except when（70）suggested （suggest） by a doctor．
分析 作者在本文告诉人们足够的睡眠对于健康非常重要，不同的人对睡眠的时间要求是不一样的，作者在文中还告诉我们如何获得有效的睡眠．
解答 61．needed； 考查非谓语．the amount of sleep之间是被动关系，所以用过去分词做定语修饰sleep，意思是"所需的睡眠量取决于人的年龄"．
62．which； 考查定语从句．先行词是conditions，在定语从句in ____sleep takes place中做介词in的宾语，所以用关系代词which来引导．
63．the；考查固定结构．在英语中the+形容词，表示一类人，the old 指的是"老年人"．
64．less；考查比较级．根据句意：有些人的睡眠比这个数量少．所以用比较级less．
65．It；考查代词．代词it在句中作形式主语，真正的主语是后面的不定式短语．
66．strength；考查名词，形容词性物主代词后面跟名词形式．
67．in；考查介词，in the open air 是固定搭配，意为"在户外，在露天里"．
68．neither；考查固定结构，此处用neither与后面的nor构成"neither…nor…"结构，意为"既不…也不…"．
69．to；考查介词，be helpful to是固定搭配，意为"对…有帮助"．
70．suggested；考查非谓语动词，这是"when you are suggested by a doctor"的缩写形式，省略了you are．
点评 语法填空是通过语篇在语境中考查语法知识的运用能力，在解题前应快速浏览短文掌握大意，在读懂短文的基础上，结合短文提供的特定的语言环境去逐句分析．要解决好语法填空，离不开坚实的语法知识，有了坚实的语法知识才能对语言进行正确的分析和判断，从而答对题目．
