The immune system is the body's defender. It identifies, tracks down, and destroys troublemakers before they can hurt the body. Those troublemakers may be, for example, bacteria from a cut or splinter, a measles germ, a cold bug, or even a cancer cell.  These invaders try to take over our tissues and feed off our bodies' nutrients. If they succeed, we become sick or, sometimes, even die. It's the job of our immune systems to destroy these invaders before they destroy us. Say you picked up a flu virus last week. Perhaps it entered your body through a cut, from a drinking glass, or from the air you breathe. Of course, you didn't feel it, but the virus made its way into your bloodstream. As soon as it entered your body, it began to reproduce. Viruses have only one goal: to take over your cells. Once inside your body, viruses try to enter cells and disrupt their normal work. If left alone, these viruses would hurt so many cells that you would weaken, or worse, get a serious illness.  But this flu virus should not be so complacent as it seems to be. As it reproduces in your bloodstream, the virus is met by a certain kind of white blood cell, the lymphocytes. The  _ are the foot soldiers that keep you alive.  The number of lymphocytes in your body is hard to imagine. Thousands of them could fit in the period at the end of this sentence. Your body holds about a trillion --that's 1,000,000,000,000 of them, or about 3,000 in every drop of blood.  _   Some of these lymphocytes pass through a small walnut-sized organ called the thymus. The thymus is the base of the neck. Here, special hormones turn lymphocytes into fighting cells, called T cells. T cells have one terrific talent: They can tell the difference between friend and foe; what should be in our bodies and what shouldn't. They do not affect the body 's healthy cells. Yet they attack everything that is foreign to our bodies, such as germs, transplants, and even our own cells which have become abnormal, as in the case of cancer. Which of the following questions best summaries the main idea of the whole passage? A) How does the immune system attack the flu virus? B) How do the lymphocytes work in our body? C) How does the immune system function in our body? D) What is the so-called immune system?
C


(Question)
It must have been around nine o'clock when I drove back home from work because it was already dark. As I came near to the gates I turned off the head lights of the car so as to prevent the beam from swinging   through the window and waking Jack, who shared the house with me. But I needn't have done so. I noticed that his light was still on, so he was awake anyway--unless he had fallen asleep while reading. I put the car away and went up the steps. Then I opened the door quietly and went to Jack's room. He was in bed awake, but he didn't even turn towards me. "What's up, Jack?" I asked. "For God's sake, don't make a noise," he said. The way he spoke reminded me of someone in pain who is afraid to talk in case he does himself serious injury. "Take your shoes off, Neville," Jack said. I thought that he must be ill and that I had better give way to him to keep him happy. "There is a snake here," he explained. "It's asleep between the sheets. I was lying on my back reading when I saw it.I knew that moving was _ . I could not have moved even I'd wanted to." I realized that he was serious. "I was depending on you to call a doctor as soon as you came home," Jack went on. "It has not bitten me yet but I dare not do anything to upset it. It might wake up. I'm sick of this," he said."I took it for granted that you would have come home an hour ago." There was no time to argue or apologize for being late.I looked at him as encouraging as I could and went to telephone the doctor. According to the passage, Neville should have been home at   _  . A) 7 p.m. B) 8 p.m. C) 9 p.m. D) 6 p.m.
(Answer)
B


Ques: When you are little, the whole world feels like a big playground. I was living in Conyers, Georgia the summer it all happened. I was a second grader, but my best friend Stephanie was only in the first grade. Both of our parents were at work and most of the time they let us go our own way.  It was a hot afternoon and we decided to have an adventure in Stephanie's basement. As I opened the basement door, before us lay the biggest room, full of amazing things like guns, dolls, and old clothes. I ran downstairs, and spotted red steel can. It was paint. I looked beyond it and there lay even more paint in bright color1s like purple, orange, blue and green.  "Stephanie, I just found us a project for the day. Get some paintbrushes. We are fixing to paint." She screamed with excitement as I told her of my secret plans and immediately we got to work. We gathered all the brushes we could find and moved all of our materials to my yard. There on the road in front of my house, we painted bit stripes   of color1s across the pavement  . Stripe by stripe, our color1s turned into a beautiful rainbow. It was fantastic! The sun was starting to sink. I saw a car in the distance and jumped up as I recognized the car. It was my mother. I couldn't wait to show her my masterpiece. The car pulled slowly into the driveway and from the look on my mother's face, I could tell that I was in deep trouble.  My mother shut the car door and walked towards me. Her eyes glaring, she shouted, "What in the world were you thinking? I understood when you made castles out of leaves, and climbed the neighbors' trees, but this! Come inside right now!" I stood there glaring hack at her for a minute, angry because she had insulted   my art.   "Now go clean it up!" Mother and I began cleaning the road. Tears ran down my cheeks as I saw my beautiful rainbow turn into black cement.    Though years have now passed, I still wonder where my rainbow has gone. I wonder if, maybe when I get older, I can find my rainbow and never have to brush it away. I guess we... It can be learned from the passage that parents should   _  . A) encourage children to paint B) protect rather than destroy children's dreams C) discover the hidden talent in children D) value friendship among children
Ans:
B