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    8．One Monday morning，Paul and his classmates were in science laboratory for their practical chemistry lesson．The students were going to work in pairs to do an experiment．Before they began，the teacher gave them this description of the different stages of the experiment．
    Stage 1：Prepare the equipment：a test tube，a crucible，a Bunsen burner and tongs．
    Stage 2：Weigh 5grams of baking soda （sodium bicarbonate） and put it in a crucible．
    Stage 3：Heat 10ml of hydrochloric acid （盐酸） in a test tube．
    Stage 4：Pour the warm acid onto the baking soda and continue to heat the mixture．
    Result：The acid reacts with the bicarbonate（碳酸氢盐）to form water，carbon dioxide gas and salt．The hotter the mixture，the quicker the reaction．Continue to heat the mixture until the water evaporates，leaving the salt in the crucible．
    Paul and his partner followed the instructions and set up their equipment．Paul went to the cupboard to get a bottle of hydrochloric acid．He found that there was only one bottle in the cupboard so he took that．There was no label on the bottle and Paul didn't check with the teacher if it was the right solution．
    He measured the liquid and poured it into a test tube．Using tongs to hold the test tube，he heated it over the Bunsen burner．That's when things started to go wrong．The liquid in the test tube was not hydrochloric acid．When it was heated，it formed a thick cloud of white gas．Soon the room was full of this strong smelling white gas．
    All the students started coughing and their eyes hurt．The teacher immediately opened the windows and ordered the students to leave the laboratory at once．She realized that the liquid was a crylamide （丙烯酰胺） and that it is poisonous．
    Fortunately，nobody was injured in the incident．However，it taught the students and the teacher a good lesson．

    43．What lesson did the incident teach the students and the teacher？A
    A．Never have a bottle without a label in the chemistry lab!
    B．Obey your teacher's instructions in the Chemistry lab．
    C．Acrylamide can't take the place of hydrochloric acid．
    D．Finding something unusual happened，you have to leave the laboratory at once．
    44．What substance were the students making in the experiment？C
    A．Water              B．Carbon dioxide gas         
    C．Salt               D．Poisonous gas
    45．Why did Paul make the mistake？D
    A．He went to the cupboard to get the bottle by himself．
    B．He found that there was only one bottle in the cupboard so he took that．
    C．There was no label on the bottle．
    D．Paul didn't check with the teacher that it was the right solution．
    46．Why did the teacher send the students out of the classroom？C
    A．Because the room was full of this strong smelling white gas．
    B．Because all the students started coughing and their eyes hurt．
    C．Because the liquid was a crylamide and that it is poisonous．
    D．Because someone was injured in the incident．

    分析 一天上午，Paul和同学们在科学实验室上化学实验课．同学们在老师的指导下分组进行实验．Paul误用了一个没有贴标签瓶子里的液体，结果出现了意外，丙烯酰胺反应后生成了有毒的气体．

    解答 43．A．细节理解题．根据文章可知，同学们遵守老师的指导进行实验，排除B；Paul不知道瓶子里装的是crylamide，排除C；出现紧急情况时，要看情况的严重性再作出判断，排除D．实验出错的原因是Paul用了那个没有贴标签的瓶子里面的物质，故选A．
    44．C．细节理解题．根据文章"The acid reacts with the bicarbonate（碳酸氢盐）to form water，carbon dioxide gas and salt…leaving the salt in the crucible"可知，同学们做实验要得到的物质是盐，故选C．
    45．D．细节理解题．根据文章"there was only one bottle in the cupboard so he took that．There was no label on the bottle and Paul didn't check with the teacher if it was the right solution"可知，瓶子上没有贴标签，Paul没有和老师一起检查这个瓶子是否适合做实验用，故选D．
    46．C．推理判断题．根据最后一段"She realized that the liquid was a crylamide （丙烯酰胺） and that it is poisonous．"可知，老师发现发生反应的是丙烯酰胺，而丙烯酰胺是有毒的，故选C．

    点评 考察学生的细节理解和推理判断能力，做细节理解题时一定要找到文章中的原句，和题干进行比较，再做出正确的选择．在做推理判断题不要以个人的主观想象代替文章的事实，要根据文章事实进行合乎逻辑的推理判断．

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    科目：高中英语 来源： 题型：阅读理解

    17．Steve Flaig of Grand Rapids，Michigan，knew he'd been adopted as a baby，and when he turned 18，in 2003，he decided he'd try to track down his birth mother．The agency from which he'd been adopted gave him his mother's name：Christine Tallady．But online searches didn't turn up any results，and Flaig let it go．
    In 2007，though，he searched for the name again online．This time，the search results included a home address near the Lowe's store where Flaig，then 22，worked as a deliveryman．When he mentioned the coincidence to his boss，his boss said，"You mean Chris Tallady，who works here？"
    Flaig and Tallady，45，a cashier，had said hi to each other a few times at the store，but they'd never really talked．He hadn't even known her name．Flaig thought，"There's no possible way she's my mother．"
    For a few months，Flaig avoided Tallady．"I wasn't sure how to approach her，"he told a local reporter．Finally，an adoption agency employee volunteered to call Tallady for him．
    When Tallady realized that the nice guy she'd been waving at was her son，she blubbered．"I wasn't ready to be a mother at that time．"She'd given him up for adoption in 1985，when she was 23．However，she'd always hoped to meet her birth son one day．Later that day，mother and son talked for almost three hours at a nearby bar．
    Married with two other children，Tallady said，"I have a complete family now．"

    21．What did Steve Flaig do in the Lowe's store in 2007？A
    A．He worked as a deliveryman．   B．He was as a cashier．
    C．He was the boss of the shop．  D．He was a local reporter．
    22．The underlined word"blubbered"in Paragraph 5probably meansC．
    A．shouted aloud     B．read aloud    C．said while crying   D．sang happily
    23．What would be the best title for the passage？A
    A．Remarkable Reunion．          B．An Adopted Son．
    C．A Boss Helped Flaig           D．A Cashier's Experience．

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    科目：高中英语 来源： 题型：阅读理解

    18．I really love my job because I enjoy working with small children and like the challenges and awards from the job．I also think my work is important．There was a time when I thought I would never have that sort of career．
    I wasn't an excellent student because I didn't do much schoolwork．In my final term I started thinking what I might do and found I didn't have much to offer．I just accepted that I wasn't the type to have a career．
    I then found myself a job，looking after two little girls．It wasn't too bad at first．But the problems began when I agreed to live in，so that I would be there if my boss had to go out for business in the evening．We agreed that if I had to work extra hours one week，she'd give me time off the next．But unfortunately，it didn't often work out．I was getting extremely tired and fed up，because I had too many late nights and early mornings with the children．
    One Sunday，I was in the park with the children，and met Megan who used to go to school with me．I told her about my situation．She suggested that I should do a course and get a qualification（资格证）if I wanted to work with children．I didn't think I would be accepted because I didn't take many exams in school．She persuaded me to phone the local college and they were really helpful．My experience counted for a lot and I got on a part-time course．I had to leave my job with the family，and got work helping out at a kindergarten．
    Now I've got a full-time job there．I shall always be thankful to Megan．I wish I had known earlier that you could have a career，even if you aren't top of the class at school．
    56．What is the author's present job？D
    A．Working part-time in a college．
    B．Taking care of children for a family．
    C．Helping children with their schoolwork．
    D．Looking after children at a kindergarten．
    57．When staying with the two girls'family，the authorB．
    A．was paid for extra work                  
    B．often worked long hours
    C．got much help form her boss               
    D．took a day off every other week
    58．Why did the author leave her first job？C
    A．She found a full-time job．
    B．She was fed up with children．
    C．She decided to attend a part-time course．
    D．She needed a test after working extra hours．
    59．What has the author learned from her own experiences？A
    A．Less successful students can still have a career．
    B．Qualifications are necessary for a career．
    C．Hard work makes an excellent student．
    D．One must choose the job she likes．

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