since you took it up. _______ this new language can give you a new view of life. It can also open the way into _________ (people) minds and hearts, into a culture that is very different from the one of your own. This will make you richer and richer in things that money can’t __________ . Ⅳ. 阅读理解
A
13、Harmful microbes (微生物) like bacteria (细菌), viruses (病毒) and other germs (病菌) are pathogens (病原体). They may enter your bodies and make you ill. The immune system (免疫系统) is the body’s defence (防卫) system that protects you from illness and disease caused by the pathogens.
The immune system is made up of non-specialized defences such as skin, tears and the acidic juice produced by the stomach, keeping you from the pathogens. It also has some highly specialized defences, which are different kinds of immune cells (细胞), grouped into phagocytes (噬菌细胞) and lymphocytes (淋巴细胞). Phagocytes are a type of white blood cell. They are swimming around in your blood stream, always on the lookout for antigens (抗原) —the pathogens that have entered your bodies. Whenever they see one, they will eat it. However, some antigens are hard to find and kill. Then lymphocytes, which are also white blood cells and the main types are B cells, T helper cells and T killer cells, will be the killers of the sneaky antigens. B cells, T helper and T killer cells work together to find and kill these antigens. B cells produce substances, called antibodies, which stick to the antigen. When that happens, it will tell the T helper cells to come over and either: 1. help the B cells kill the antigen, or 2. call the phagocytes or T killer cells to move in for the kill. Once a B cell or a T cell attacks an antigen, they create cells to “remember” it. Those “memory cells” hang out in your blood and if they see the same antigen again, they quickly recognize (识别) it so your immune system can act faster at killing it.
The immune system is more powerful than you probably imagine. Scientists from the University of Pennsylvania recently took immune cells from three patients with leukemia (白血病), then genetically changed them into “serial killer” cells to attack cancer cells. The study was small but the results were ground-breaking. The modified immune cells increased at least 1,000 times in the body and killed all the cancer cells. Therefore, more “memory cells” were created.
The immune system can be developed. Eating lean protein food (beef, beans) and food rich in vitamins A, C and E (sweet potatoes, carrots)，taking a 30-minute walk every day and reducing your stress levels, will help you achieve it. 1．The immune system can _________.
A．keep you from antibodies. B．protect you against antigens.
C．make your bodies weak and sick. D．help microbes enter your bodies. 2．How are the sneaky antigens found and killed
A．B cells produce antibodies to tell T helper and T killer cells. B．B cells create “memory cells” to swim around in the blood.
C．Skin, tears, acidic juice and immune cells work together. D．Phagocytes, B cells, T helper and T killer cells work together. 3．After a B cell or a T cell attacks an antigen, they create _________. A．phagocytes B．lymphocytes C．memory cells D．serial killer 4．The underlined word “it” in the last paragraph refers to _________. A．Less antigens can be killed by the immune system B．The immune system can be changed into the “serial killer” C．White blood cells act less quickly in the immune system D．The immune system can be made more powerful 5．This article is mainly about _________.
A．the types of white blood cells B．an introduction to the immune system C．a research report about human health D．the cause of illness and disease
B
14、Show your Art Talent
Your picture can be either colored or black-and-white. All drawings must be handed in to your Art teacher by May 1st.
1．Which of the following would be a proper picture for the competition?
A． B． C． D．
2．Besides your picture, you must write about __________. A．why you like the place so much B．why drawing is your favorite hobby C．whether you think you can win D．when you started learning to draw
3．According to the ad (广告), all winners can get __________. A．a $100 prize B．a $70 prize
C．a favorite place in school D．their pictures on show 4．The competition is organized by__________. A．an Art teacher B．LCPS Art Department C．the headmaster D．Lucky Books & Stationery 5．How soon will all the winning pictures be on show? A．Two months. B．One month. C．Half a month. D．Three months.
C
15、My father was 44 and knew he wasn’t going to make it to 45. He wrote me a letter and hoped that something in it would help me for the rest of my life.
Since the day I was 12 and first read his letter, some of his words have lived in my heart. One part always stands out. \something great that will set you among the very best.\permission to believe in myself. \did I, but at times in my life when I’ve felt proud of myself , I remember his words and wish he were here so I could ask, \
A long way from 12 now, I realize he would have been proud when I made any progress. Lately, though, I've come to believe he would want me to move on to what comes next: to be proud of , and believe in , somebody else. It’s time to start writing my own letters to my children . Our children look to us with the same unanswered question we had. Our kids don't hold back because they're afraid to fail. They’re only afraid of failing us. They don't worry about being disappointed. Their fear ---as mine was until my father's letter ---is of being a disappointment .
Give your children permission to succeed. They're waiting for you to believe in them. I always knew
my parents loved me. But trust me：That belief will be more complete , that love will be more real, and their belief in themselves will be greater if you write the words on their hearts：\something great .\1．We learn from the text that the author ______ A．lost his father when he was young
B．worked hard before he read his father’s letter C．asked his father’s permission to believe in himself D．knew exactly what great thing his father wanted him to do 2．What does the author tell us in the 3rd paragraph ? A．Children need their parents' letters. B．Children are afraid to be disappointed . C．His children’s fear of failure held them back.
D．His father’s letter removed his fear of failing his parents. 3．The main purpose of the text is to . A．describe children's thinking B．answer some questions children have C．stress the importance of communication D．advise parents to encourage their children
D
16、 Summer is a great time to improve your child's reading! Reading over the summer can help your child keep up his reading gains during the past school year and also help prepare him for the next year!
How to sign up:
We are inviting you to sign up for free to help your child be an active reader this summer. *Go to www. readfun. org * Select“ Parent”(NOT“ Teacher”) * Click on the blue“ Sign Up” What we provide:
We provide you with thousands of free, high-quality articles with questions and activities. To make summer reading easy, we have chosen interesting and knowledge-filled articles of different levels. You can go towww. readfun. org/summer-reading to download and print the articles for free. How to use:
TIP l: Articles for summer reading should be accessible, so be sure to choose articles atyour child's reading level. Don't be afraid to start with articles of lower grade levels. The important thing is that he
reads, reads, reads!
TIP 2: It's also important to help your kid develop good reading habits. Help him keep a good record of his summer reading. Besides, encourage him to discuss what he has read with family members. That way, you will all have a good time. We wish you and your family a great summer! 1．The first two sentences of the text above are about____________ A．different types of books B．the coming school year
C．the importance of summer reading D．good places for summer reading
2．One of the steps for parents to sign up on www. readfun. org is to_________. A．select“ Parent B．finish a test C．choose a tip D．print an article
3．What does www. readfun. org provide? A．Online teachers. B．Pen friends’ information. C．Interesting videos. D．Articles of different levels.
4．The underlined word \A．write
B．discuss
C．understand
D．compare
5．The text above is written to______________. A．introduce a reading programme B．sell books to school kids C．encourage parents to read more D．share reading experience
E
17、Do you know some great inventors and their inventions? What factors (因素) are needed for their success?
Well, good timing for a start. You can have a great idea which the public simply doesn’t want ... yet. The Italian Giovanni Caselli invented the first fax(传真)machine in the 1860s. Although the machine was excellent, his invention quickly died a commercial(商业的) death. It was not until the 1980s that the fax became very common in every office... too late for Giovanni Caselli.
Money also helps. The Frenchman Denis Papin (1647-1712) had the idea for a steam engine (蒸汽
《加21套中考模拟卷》江苏省苏州市草桥实验中学2019-2020学年中考英语模拟试卷含解析
