Vitamins are complex chemical substances found in many foods. The human body needs them for health and growth. The body makes some vitamins, but usually in amounts too small to meet its needs. Other vitamins are not made in the body. These must be supplied. No one knows exactly how all vitamins work. Doctors do know that vitamins have very special uses. One vitamin therefore cannot take the place of another. The steady absence of one vitamin in an otherwise complete diet causes a deficiency disease. Rickets, scurvy, and pellagra are examples of deficiency diseases.  It is best to obtain vitamins by eating the foods in which they occur. There are also pills that contain a single vitamin or a combination of vitamins people should consult their doctors before they take any vitamin pills. Scientists have discovered about 25 vitamins and their different forms that are very important to human beings and other forms of life. Experts believe that there are many more vitamins to be discovered. There are two basic groups of vitamins. One group of vitamins dissolves in fat and is therefore called the "fat-soluble" group. Vitamins A, D, E and K are in this group. The other group is known as "water-soluble" vitamins. These vitamins, understandably, dissolve in water. Among this group are Vitamin C and the B group of vitamins. Vitamin A aids the building and growth of body cells. This vitamin is therefore vital for the growth of children and for good development of babies before birth. Vitamin A is also important for good vision at night. Vitamin B1 is also called thiamine. This vitamin prevents and cures disease. Vitamin B2, called riboflavin, is needed for growth, healthy skin, and for the eyes. Vitamin C, or ascorbic acid, prevents and cures scurvy. Vitamin D is a group of 10 vitamins that prevents rickets. Scientist believe that Vitamin D3 forms in the skin when the body is exposed to sunlight. Because of this, it is called the "sunshine vitamin". A lack of Vitamin D may lead to bone damage; too much may cause kidney... Which of the following statements is true? A) The human body can produce enough vitamins for itself. B) Until now, scientists have discovered all the vitamins we need. C) People should take more vitamins. D) Each kind of vitamin plays a special role in human body.
D
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Mum, it's me. Hopefully, this Mothering Sunday you will get to hear those three words. I will, of course, try to phone you. I hope we will be able to speak for the allowed 10 minutes. But I suspect many inmates will be using the phone, so if I don't call and if we don't speak, then this is what I would have said: It's not your fault that I am here. I know that deep in your heart you have questioned whether my current circumstance is somehow your fault, if the reckless stupidity of my past is somehow a failure on your part. It is not. Only one person is to blame, only one person should hurt -- me. You have always taught me that when the room goes dark, you can wait for the lights to be switched back on or you can search in the dark and turn the light on yourself. You are my light. You always have been and always will be. There is nobody I admire more, nobody I have strived harder to please in my life, which is why my current failure hurts me so much. I am so sorry that I will not be there to see you, but I want you to know that now, as always, you are here with me. In my darkest hours, and in the coldest loneliness of my past few months, my mind has so often wandered to the past, to when it was you and me -- and I have been able to smile. Yours is the strength that I draw upon. A parent's job is to make sure that they pass on the best of themselves to their children. You have done that. It is the inner you in me that will get me through _ . I have failed you so epically, but you have never failed me. If I think back to the tears I shed when Dad left, all those years ago, I see you through their misty glaze. You holding me and you telling me we'd be OK, and we will be. We are and always will be the best team. Childhood heroes such as footballers, actors and rock stars are _ . If the job's done right, a child's heroes should be their parents -- you are mine. The strength you showed after the divorce from Dad to find your biological parents, to go to university and get your teaching qualifications, to begin your... What did the author do in the loneliness of his past months? A) He summed up the causes of the failure in his life. B) He planned to help his mother find her birth parents. C) He recalled the fond memories of being with his mother. D) He prepared himself to go to university for further studies.
C
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While they were almost unknown twenty years ago, it seems that mobile phones these days are part of everyone's life. However, as with other inventions such as the television and the computer, they are a double-edged sword, inviting both supporters and opponents, especially in regard to their use in public places like restaurants and cinemas. One of the strongest arguments in favor of forbidding mobiles in public places is the trouble they cause to other people. For example, although we are often asked to turn off our phones when in a cinema, the film that we are watching is often interrupted by the sound of at least five rings. To make it even worse, some people insist on continuing their conversation, even though hundreds of people can hear what they say, which often drowns out the voice from the film. As a result, many people would welcome a ban on mobile phones in places where they might disturb other people. On the other hand, there are a number of arguments against such a ban. It is difficult to stop people bringing with them their mobile phones in public places, making it almost impossible to call for a ban. Some people would see this as an infringement of their rights, while other people would say they need them in case of an emergency. Despite being asked to silence their phones, some people insist on leaving them on.  It seems to me that a ban on mobile phones would not have any result in the end. People will find a way to escape a ban. Nevertheless, people should be discouraged from using them in public places, unless it is highly necessary. They should be made to know that it is bad manners to use them in certain places or at certain times. Of course, there will always be someone who thinks their call is more important than others' peace and quiet! Among those who are against a ban, some believe that   _  . A) they can turn off their mobiles when it is necessary B) it is their right to use their mobiles in public places C) a ban on mobiles would not have any result D) they can silence their mobiles when in public places

B
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