Great changes _____ in this city over the past five years.

We all enjoy the colors of autumn leaves. Did you ever wonder how and why a fall leaf changes color? Where do the yellows and oranges come from? To answer those questions, we first have to understand what leaves are and what they do.
Leaves are nature's food factories. Plants take water from the ground through their roots. They take a gas called carbon dioxide from the air. Plants use sunlight to turn water and carbon dioxide into glucose, which is a kind of sugar. Plants use glucose as food for energy and as a building block for growing. The way plants turn water and carbon dioxide into sugar is called photosynthesis, which means " putting together with light. " A chemical called chlorophyll helps make photosynthesis happen. Chlorophyll is what gives plants their green color.
As summer ends and autumn comes, the days get shorter and shorter. This is how the trees "know" to begin getting ready for winter.
During winter, there is not enough light or water for photosynthesis. The trees will rest, and live off the food they stored during summer. They begin to shut down their food-making factories. The green chlorophyll disappears from the leaves. As the bright green fades away, we begin to see yellow and orange colors. Small a-mounts of these colors have been in the leaves all along. Covered up by the green chlorophyll, we just can't see them in summer.
The bright reds and purples we see in leaves are made mostly in the fall. In some trees, like maples, glucose is trapped in the leaves after photosynthesis stops. Sunlight and the cool nights of autumn cause the leaves turn this glucose into a red color. The brown color of trees like oaks is made from wastes left in the leaves.
It is the combination of all these things that make the beautiful colors we enjoy in the fall.
【小题1】The writer asked two questions in the beginning in order to        .

Who are these people rushing by you in the street?  More than 215 million people now call America “home”, but most of them can trace their families back to other parts of the world. If you look at the names on shop windows, you will see that Americans come from many different lands. The idea that these people, who once were strangers to the United States, have lost the customs and cultures of their original countries and have become “Americans” is really not true. In fact, what exists in America is more often a kind of “side-by-side” living in which groups of people from other countries often have kept many of their customs and habits. They join the general American society only in certain areas of their lives—such as in schools, business, and sports—but they keep many of their own native customs and manners socially and at home. This “side-by-side” living style has both advantages and disadvantages. Sometimes it may cause disagreements to develop between groups whose ways of life are very different from one another. However, there are also great advantages that come from the variety of cultures brought by settlers from other lands. There is great freedom of choice among ideas and dress, food, and social customs in America. Everyone can find some part of his or her familiar world in the United States, in churches, music, food, national groups, or newspapers.

71. More than 215 million people call America “home” because_______.

A. they buy their houses there

B. they settle there now

C. they get married there

D. they were born there

72. “Side-by-side” living style means_______ .

A. making friends with native people and keeping their own cultures

B. keeping their own customs while sharing American ones in certain areas

C. the groups of people who live nearby

D. that they get closer to American society

73. According to the passage, people in the USA_______ .

A. share American customs and culture

B. live in a kind of “side-by-side” society

C. keep their own customs and habits firmly

D. make no choice to accept American customs

74. Which of the following statements is TRUE?

A. They always stick to their own customs and habits.

B. “Side-by-side” living style is not suitable.

C. They face the society they are not familiar with and make changes in their customs.

D. The advantages coming from the variety of cultures make life in America colorful.

75. Which of the following is the best title of the passage?

A. Advantages and Disadvantages

B. Different Customs and Habits

C. Home for the People

D. “Side-by-side” Living Style in America

Great changes ______ in my school in the past ten years.

Michel is a young girl who works for the police as a handwriting expert. She has helped   26  many criminals  27 using her special talents.
When she was fourteen, Michel was already so interested in the   28  in her friends’ handwriting  29 she would spend hours  30 them.. after  31 college she went to France for a special two-year class in  32 at the School of Police Science.
Michel says that it is  33 for people to hide their handwriting. She can discover  34 of what she needs to know simply by looking at the writing with her own  35 , but she also has machines  36 help her  37 different kinds of paper and ink. This knowledge is often  38  great help to the  39 .
Michel believes that handwriting is a good sign of  40 kind of person the writer  41  .”I wouldn’t go out with a fellow  42 I didn’t like his handwriting,” she says. But she adds she  43  in love with her future husband, a young policeman  44  she studied his handwriting. It is later proved to be all right,  45 .