题目内容
7．Jane was asked a lot of questions，but she didn't answer of them．（ ）| A． | other | B． | any | C． | none | D． | some |
分析 Jane被问道很多问题，但她一个都没回答．
解答 答案：B
句意表达的是否定；other别的，其它的；any与not连用，表示全部否定，相当于none；none本身就表达否定，不需要与not连用；some用于肯定句中．故选B．
点评 不定代词的用法较多，是一个比较难的语言点．常用的有：some（something，somebody，someone），any（anything，anybody，anyone），no（nothing，nobody，no one），every（everything，everybody，everyone，），all，each，both，much，many，（a）little，（a）few，other（s），another，none，one，either，neither等．学习时，要注意区分和掌握．
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18．Lead poisoning occurs when lead is presented in high level in the blood of a person．It is the most common medical problem found in children．And it's important to recognize the presence of lead in a child's body because lead is very harmful．
Children have the tendency to go around and put things in their mouth like paint．This is one of the main causes of lead poisoning．I also have found that children born in poor families have higher chances of getting exposed to lead．Lead can also be found in old water pipes and food and juice cans．
Some of the common symptoms of lead poisoning in children are headaches，stomach pain，hair loss，muscle weakness，weight loss，ect．
Lead poisoning can have severe effects and can lead to heart diseases，kidney diseases and other problems．It can also result in mental retardation and low I．Q．level．There have been cases where lead poisoning proves to be deadly for the child．
It's difficult to recognize whether a child is affected with lead poisoning easily，as the symptoms of this disease can occur due to some other medical problems．Therefore，children under the age of 6should regularly be checked to know the level of lead in their blood，through blood test．It's possible to completely cure a child with lead poisoning through treatment．Usually，oral medicines are given to the child，while sometimes，they're injected for reducing the lead level．Children who have very high level of lead in their blood would need treatment for a long period of time and would also be put on a special diet．
Parents have to take certain measures to lower the chance of lead poisoning in children．Cleaning the house regularly and removing shoes at the door，after coming from outside，will prevent the lead particles（微粒） from entering the house．Children should be put on a healthy diet，containing high proportions （比例） of calcium and iron，such as eggs，milk，fruits，potatoes，ect．which helps to keep the lead level in control，in the child's body．In short，parents should be careful and protect their children from the horrible consequences of lead poisoning．
Lead Poisoning in Children
Children have the tendency to go around and put things in their mouth like paint．This is one of the main causes of lead poisoning．I also have found that children born in poor families have higher chances of getting exposed to lead．Lead can also be found in old water pipes and food and juice cans．
Some of the common symptoms of lead poisoning in children are headaches，stomach pain，hair loss，muscle weakness，weight loss，ect．
Lead poisoning can have severe effects and can lead to heart diseases，kidney diseases and other problems．It can also result in mental retardation and low I．Q．level．There have been cases where lead poisoning proves to be deadly for the child．
It's difficult to recognize whether a child is affected with lead poisoning easily，as the symptoms of this disease can occur due to some other medical problems．Therefore，children under the age of 6should regularly be checked to know the level of lead in their blood，through blood test．It's possible to completely cure a child with lead poisoning through treatment．Usually，oral medicines are given to the child，while sometimes，they're injected for reducing the lead level．Children who have very high level of lead in their blood would need treatment for a long period of time and would also be put on a special diet．
Parents have to take certain measures to lower the chance of lead poisoning in children．Cleaning the house regularly and removing shoes at the door，after coming from outside，will prevent the lead particles（微粒） from entering the house．Children should be put on a healthy diet，containing high proportions （比例） of calcium and iron，such as eggs，milk，fruits，potatoes，ect．which helps to keep the lead level in control，in the child's body．In short，parents should be careful and protect their children from the horrible consequences of lead poisoning．
Lead Poisoning in Children
| Paragraph outline | Supporting details |
| Introduction | •A person is （71）poisoned by lead when it is presented in high levels in the blood． •Lead poisoning is not a（n） （72）uncommon medical problem in children． |
Causes | •Children may put harmful things in their mouth． •Children from poor families are more likely to have （73）access to lead． •Lead can be contained in old water pipes，food and juice cans |
| （74）Symptoms | Headaches，stomach pain，hair loss，muscle weakness，weight loss，ect． |
（75）Effects | •It can lead to several kinds of diseases． •It can （76）cause mental retardation and low I．Q．level． |
Treatment | •Children below six should receive （77）regularcheck to know the lead level． •Children take oral medicines or receive an injection to （78）reducethe lead level． •Children with high level of lead should be（79）treatedfor a long time and have a special diet． |
Prevention | •Clean the house and remove shoes at the door after coming from outside． •Give children a（80）variety of healthy food． |
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