A boy walked along Carver Street, singing a sad song. He walked with his head down. Once he looked up and noticed the sign across the empty street, painted on the side of an old house. On the sign a big woman with yellow hair and a five-mile smile held out a big bottle. “Coca-Cola. Drink Coca-Cola,” the sign said.

“Boy!” the silence was cut by a sudden cry. He turned around quickly to see who had called.

An old woman was standing at her door.

“You boy! Come here this minute.”

Slowly the boy  36  onto the cold flat stones leading to the old woman's house. When he arrived at her house, she  37  out her hand and wrapped her  38  old fingers around his arm.

“Help me inside, boy,” she said. “Help me  39  to my bed. What's your name?”

“Joseph,” he said.

The old woman on the bed tried to  40  up, raising herself on her elbow. Water  41  from her eyes and mouth. The sight of her made Joseph feel  42 .

“I'm dying, Joseph. You can see that, can't you?  I want you to write a  43  for me. There's paper and a pencil on the table there.”

Joseph looked down at the  44  , and then looked out of the window. He saw the sign again： “Coca-Cola. Drink Coca-Cola.”

“I want my silver pin to  45  to my daughter.”

Joseph bent his small body over the table and  46  the pencil slowly across the paper.

“There's my Bible,” the old woman said. “That's for my daughter, too. I want a  47   Christian burial (基督葬礼) with lots of singing. Write that down, too. That's the last  48  of a poor old woman.”

The boy labored over the paper. Again he looked out of the window.

“Here. Bring it here so I can  49  it.”

Joseph found the Bible, and,  50  the paper inside, laid it next to the bed.

“  51  me now, boy,” she sighed. “I'm tired.”

He ran out of the house.

A cold wind blew through the  52  window, but the old woman on the bed  53   nothing. She was dead. The paper in the Bible moved back and forth in the wind.  54  on the paper were some childish letters. They  55  the words:“Coca-Cola. Drink Coca-Cola.”

                                A.  There are two types of twins: identical and non-identical twins. Identical twins are formed from a single egg in mother’s body which divides to form two separate babies. Identical twins look the same, and are often dressed by their parents in clothes of the same colors. It is often difficult to tell identical twins from each other, even when they are standing side by side. Non-identical twins come into being when the mother produces two separated eggs at the same time, both of which grow to form babies. In this case the twins look like normal brothers and sisters and are easy to tell one from the other. In the 1970s and 1980s a scientist did some research into twins. He invited many pairs of identical twins to university and asked them to take part in a week of tests. He was particularly interested in adopted (收养) twins who had been separated at birth. He would give the twins different kinds of tests to study their speed of thinking, their speech, their memory, the ways they saw and heard different things, and so on. Time and time again he found separated twins who preferred clothes of the same color, used the same kind of shaving soap, wore the same shaped square glasses and the same colored socks. There is a third type of twins, but it is a very unusual one. Twins who are joined together at birth are known in western countries as Siamese twins. 56．It is difficult to tell identical twins apart because _______. A．they are dressed in the same clothes B．they are dressed in the same color C．they are very alike D．they are standing side by side 57．If the twins are easy to tell from each other, they are ______. A．very probably non-identical twins B．surely identical twins C．surely identical twins D．always a brother and a sister 58．Which of the following is NOT true according to this passage? A．In the 1970s and 1980s a scientist did some research into the two main types of twins. B．In the week of tests, he tested their speed of thinking, their speech, their memory and some other things. C．There were twins who had been separated from each other as soon as they were born. D．Very often, separated twins were found to choose things of the same kind, the same shape and the same color. 59．This passage mainly tells us _______. A．the main types of twins B．what has been found out about twins C．how twins are formed D．how a scientist studied twins

B Nuclear power's danger to health, safety, and even life itself can be described in one word: radiation.

    Nuclear radiation has a certain mystery about it, partly because it cannot be detected by human senses. It can't be seen or heard, or touched or tasted, even though it may be all around us. There are other things like that. For example, radio waves are all around us but we can't detect them, sense them, without a radio receiver. Similarly, we can't sense radioactivity without a radiation detector. But unlike common radio waves, nuclear radiation is not harmless to human beings and other living things.

At very high levels, radiation can kill an animal or human being outright by killing masses of cells in important organs. But even the lowest levels can do serious damage. There is no level of radiation that is completely safe. If the radiation does not hit anything important, the damage may not be significant. This is the case when only a few cells are hit, and if they are killed outright. Your body will replace the dead cells with healthy ones. But if the few cells are only damaged, and if they reproduce themselves, you may be in trouble. They reproduce themselves in an unusual way. They can grow into cancer. Sometimes this does not show up for many years.

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