人体血红蛋白中含有Fe2＋离子，如果误食亚硝酸盐，会使人中毒，因为亚硝酸盐会使
Fe2＋离子转变为Fe3＋离子，生成高铁血红蛋白而丧失与O2结合的能力。服用维生素C可
缓解亚硝酸盐的中毒，这说明维生素C具有 （ ）
| A．酸性 | B．碱性 | C．氧化性 | D．还原性 |
——I hear that there was a terrible crash in the subway in Shanghai the other day.
——Yes，_____ news came as _____ shock to all of us.
| A．the;the | B．a;/ |
| C．the;a | D．/;a |
请根据下面提示，写一篇短文。词数不少于50。
In your English class，you are asked to describe the following picture and explain to your classmates how you understand it．
（请将开放作文写在答题卡指定区域内）
书面表达（共2小题）
某英文报以Learn to Manage on Our Own为题向中学生征文，请根据下列图片，讲述上周班主任生病期间你班同学的表现，写一篇短文投稿。
注意：1．词数不少于60。
2．短文内容必须包括图片所提供的主要信息（可适当增加内容）。
提示词：流动红旗：Weekly Model Class
______________________________________________________________________________
______________________________________________________________________________
______________________________________________________________________________
（请将情景作文写在答题卡指定区域内）
根据短文内容，从短文后的选项中选出能填入空白处的最佳选项。选项中有两项为多余选项。
The Internet has opened up a whole new online world for us to meet，chat and go where we’ve never been before．
But just as in face to face communication，there are some rules of behavior that should be followed when on line． Imagine how you’d feel if you were in the other person’s shoes．
For anything you’re about to send，ask yourself，“Would I say this to the person’s face？”If the answer is no，rewrite and reread． .
If someone in the chat room is rude to you，your instinct (本能) is to fire back in the same manner．But try not to do so． If it was caused by a disagreement with another member，try to fix the situation by politely discussing it．Remember to respect the beliefs and opinions of others in the chat room．
Offer advice when asked by newcomers，as they may not be sure what to do or how to communicate．When someone makes a mistake，whether it’s a stupid question or an unnecessarily long answer，be kind about it．If it’s a small mistake，you may not need to say anything．Even if you feel strongly about it，think twice before saying anything．Having good manners yourself doesn’t give you license to correct everyone else．
At the same time，if you find you are wrong，be sure to correct yourself and apologize to those that you have offended．
It is not polite to ask others personal questions such as age，sex，and marital status．Unless you know the person very well，and you are both comfortable with sharing personal information，don’t ask such questions．
| A．Everyone was new to the network once． |
| B．If you do decide to tell someone about a mistake，point it out politely． |
| C．It’s natural that there are some people who speak rudely or make mistakes online． |
| D．The basic rule is simple: treat others in the same way you would want to be treated． |
E．You should either ignore the person，or use your chat software to block their messages．
F．When you send short messages to a person online，you must say something beautiful to hear．
G．Repeat the process till you feel sure that you’d feel comfortable saying words to a person’s face．
D
Trapped on the 37th Floor
Melinda Skaar wasn’t expecting any phone calls．Skaar was working late in her office at the First Interstate bank of California．By 10:45 that night she was almost ready to go home when the phone rang．
Picking it up，she heard a guard shouting．“There is a fire！ Get out of there！”
Skaar didn’t panic．She figured that it was just a small fire．Her office building was huge．There were 62 floors and her desk was on the 37th floor．
Skaar called out to office mate Stephen Oksas，who also stayed late to work．But when they got to the hallway，they were met by a cloud of black smoke．Rushing back，Skaar shut the door and filled the space at the bottom of the door with her jacket to keep the smoke out．
Then they called 911．Before they could call their families，however，the line went dead．That meant that they were completely cut off from the outside world．All they could do was wait and hope someone would come to rescue them．
Minutes ticked by．Smoke began to float into the office．Soon it became hard for them to breathe．
Looking around，Skaar noticed a small workroom．It seemed to have cleaner air．So they crowded there．That helped for a while，but in time even the workroom was filled with deadly smoke．
Hopeless，they tried to break the windows，but the glass was not breakable．Everything they threw at just bounced back．
Defeated，they struggled back to the workroom．They felt weak and dizzy ．Soon Skaar found Oksas had passed out．
As Skaar and Oksas lay near death，rescuers were rushing to find them．At last，at about 4 a．m．，firefighters found them．
Skaar and Oksas knew they were lucky to be alive．“Sunday is my birthday，” Skaar told a reporter．She would be turning 29．But she knew she had already got the best present possible——the gift of life．What did Skaar and Oksas do when they were stopped by the fire？
| A．They called their families． |
| B．They waited where they were． |
| C．They tried to run down the stairs． |
| D．They rushed back and shut the door． |
The first sentence of the passage is to ____________．
| A．introduce Skaar |
| B．get the reader’s attention |
| C．explain the cause of the event |
| D．tell the background information |
The following helped Skaar and Oksas survive the fire except _____________．
| A．calling 911 for help |
| B．breaking the windows to get some fresh air |
| C．crowding in a small workroom for clean air |
| D．shutting the door and keeping the smoke out with a jacket |
What can we conclude from Skaar’s action in the fire？
| A．She is cleverer than Oksas． |
| B．She was trained as a firefighter． |
| C．She remained calm in the face of danger． |
| D．She had had the experience of being caught in fire． |
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