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In 1931, it was discovered that some unknown substance present only in certain foods was necessary for good health. This substance was what is now called “Vitamin A”.
Vitamin A's biggest job is to keep the eyes going. Without it, people and animals get “night blindness” and eye problems. Lack of Vitamin A for a long time can even cause total blindness, particularly among children. This had a chance to be tested in Denmark during World Was I. Because of food shortage, many children had to eat man-made butter and skim milk（脱脂奶）, which contains no Vitamin A. Soon, they developed eye diseases. It was after they were given real butter and whole milk that they had no eye problems.
After Vitamin A was discovered, it took more than thirty years of experiments for scientists to be able to get a small amount of pure Vitamin A. Vitamin A is manufactured and is used successfully to treat a number of diseases. You can easily get enough Vitamin A by eating a variety of food. Good sources of Vitamin A are liver（肝脏） from some animals and dairy products such as milk and cream. Not only many vegetables contain carotene（胡萝卜素）, from which your liver can make its own Vitamin A, some fruits also provide carotene which helps your liver to supply Vitamin A. As long as you are getting Vitamin A from food you won't need to take any extra in the form of liquid or pills.
(1)According to the passage, if Vitamin A is not provided enough, which of the following are likely to be affected most se riously?
[ ]
(2) Vitamin A is a very. important substance mainly because it _______.
[ ]
A．is hard to made
B．helps to keep one's eyes healthy
C．can make butter more delicious
D．can not be produced in large quantity
(3) What made the children in Denmark get eye diseases during World War I?
[ ]
A．The war they experienced.
B．Their poor housing conditions.
C．The experiments on food.
D．The lack of Vitamin A in their food.
(4) According to the text, the following are all good sources of Vitamin A except _______.
[ ]
(5) Which of the following could be the best title of the passage?
[ ]
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，选项中有两项为选项．
Ea sy Way s to Keep Your Brain SharpEveryone i s forgetful, but a s we age, we start to feel like our brain s are slowing down a bit-and that can be a very annoying thing． 1 Read on for some technique s worth trying．
1． 2
People who regularly made plan s and looked forward to upcoming event s had a 50 percent reduced chance of Alzheimer' s di sea se(老年性痴呆症)， according to a recent study． 3 Something a s simple a s setting a goal to have a weekly coffee date with a friend will do．There' s evidence that people who have a purpo se in life or who are working on long or short-term goal s appear to do better．In other word s, keep your brain looking forward．
2．Go for a walk．
Mildly rai sed glucose(葡萄糖)level s can harm the area of the brain that help s you form memorie s and phy sical activity can help get blood glucose down to normal level s．In fact, exerci se produce s chemical s that are good for your brain． 4
3．Learn something new．
Take a Spani sh cla s s online, join a drawing club, or learn to play card s．A study found that mental stimulation limit s the weakening effect s of aging on memory and the mind．But the be st thing for your brain i s when you learn something new and are phy sically active at the same time． 5 Or you can ju st go dancing with your friend s．
A．Focu s on the future．
B．Thi s can be e specially harmful to the aged．
C．It should be something like learning gardening．
D．So take a few minute s each day to do some reading．
E．But don't worry if our schedule i sn't filled with life－changing event s．
F．Luckily, re search show s there i s a lot you can do to avoid tho se moment s．
G．In other word s, when you take care of your body, you take care of your brain．
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On the first day of my new high school, I almost had a nervous breakdown. Everything about the school seemed so difficult. When I got home, my parents said, “You're nervous and that's okay. Everyone is afraid of high school. ”I denied it. I wanted to be strong, so I refused to let anyone know about my fear, even my closest friends.
On the first day I was late for every class and was constantly lost. The school seemed like a puzzle that I couldn't figure out. Was this how the whole year was going to be？ I didn't think I could rise to this challenge, especially carrying a huge backpack that I could hardly lift. It was so big that I could knock someone out with it！The schoolmates seemed to regard me as a fool, and they were probably right.
Despite my fears, after the first week I finally had my schedule figured out.
With the exception of falling up and down the stairs a couple of times and getting laughed at, high school was turning out to be not so bad. It was actually much better than middle school and much more challenging.
Since then, I've been elected vice president of my class, which wasn't much of a victory since only three people ran for the four positions.
It is normal to be scared about a new school. Take a deep breath and relax. High school is something that any student can overcome. Make sure you participate in some out-of-class activities because you’ll find it easier to make friends. Try to do your best, even if it isn't straight A’s.
Most important of all, be who you are , whether you're a “fool”, an athlete, or a lower grader. Don't try to pretend to be someone you're not. Now you know the true secrets of high school.
60. The main reason for the authors fear on his first day is that .
A. he was unable to work out the puzzle
B. his schoolmates were unfriendly to him
C. he was not familiar with the new surroundings
D. his schoolbag was too heavy for him to carry
61. From the author's first day experience we can infer that .
A. his home was far from the school
B. he got to school after classes began
C. he didn’t get any school schedule
D. he didn't know the right way to class
62. After his first week at school, the author .
A. was still not accustomed to the schedule
B. gradually adjusted himself to the new school
C. found high school not so challenging as he had imagined
D. ran for president of his class against three other students
63. According to the passage, the secret of the author’s success lies mainly in .
A. making more friends B. getting more A’s at school
C. being who he really is D. joining in out-of-class activities
A
Ever since humans lived on the earth, they have made v 【小题1】 forms of communication. In general, the major form of expressing thoughts and feelings has been s_【小题2】__ language. But when there is a language barrier(障碍), that is, people m 【小题3】 each other , communication is completed through body language where gestures r 【小题4】 letters , words and ideas. Here are many forms of body language in the world, each having its own f 【小题5】 .
Smile is the most u 【小题6】 facial expression, which shows happiness and put people at
e 【小题7】 . When someone gets angry, he may f 【小题8】_, turn his back to others or make a fist shaking it.
There are also different ways to g 【小题9】__ someone in different countries. In a word, We should study international customs to avoid difficulties in today’s world c 【小题10】 crossroads. B.
My aunt, a s 【小题11】__ in women’s disease, devoted all her life to her w 【小题12】career without e 【小题13】 . She often worked far into the night to d 【小题14】 babies for the poor . It was her kindness and c 【小题15】 she showed to her patients that made her successful . Despite of being a success as a doctor, she was m 【小题16】 , not proud.
Her devotion to medical science i 【小题17】 me greatly. Suddenly a bright idea came c 【小题18】 in my mind, “why not c 【小题19】 on her career and work as an o 【小题20】doctor?”