Rivers are one of our most important natural resources. Many of the world’s great cities are located on rivers, and almost __1_______ country has at least one river __2_______(flow) through it that plays __3________ important part in the lives of its people.
Since the beginning of history, people _4______________ (use) rivers for transportation. The longest one in the United States is the Mississippi, and the lifeline of Egypt is the Nile. __5_____________ transportation, rivers give water to drink, water for crops, and chances for fun and recreation （消遣，娱乐活动）for the people __6________________ live along their banks.
However, large cities and industries that are located on rivers often make problems. As the cities grow __7____________ size and industries increase in number, the water in the rivers becomes __8_____________ (pollute) with chemicals and other materials. People come to kwon the __9_____________ (important) of doing more to keep their rivers clean __10_____________ they want to enjoy the benefits of this natural resource.
The Internet has become part of young people’s life. _1. _______ report shows that 38% of students often use the Internet. Most of them get _2.________ (use) information on the Internet _3._______ use the Internet to help with their studies. But many students don’t use it _4.________ a good way. Some play games too much, and some visit websites __5.__________ shouldn’t look at. So bad things may happen __6._________ students spend too much time on the Internet.
__7._______ is important for students to use the Internet properly. Now we have a textbook, __8._______ uses many examples to teach students some good ways to use the Internet. It gives useful __9._______(advise).
Some students also make friends on the Internet. But if you want to have a face-to-face _10.__ ______ (meet) with your online friends, please let your parents know and meet in a proper place.
Soon after Dave left college, one of his uncles, 1 was rich and had no children of his own died and 2 (leave) Dave a lot of money, so he decided to set up his own real estate agency(地产公司).
He found a nice office, 3 (buy) some new furniture and moved in. He had only been there for a few hours when he heard someone coming 4 the door of his office.
“It’s my first customer!” he thought. He quickly picked up 5 telephone and pretended to be very busy 6 （answer）an important call from someone in New York 7 wanted to buy a big and expensive house in the country.
The man knocked at the door 8 this was going on, came in and waited 9 (polite) for the agent to finish his conversation. Then he said to him, “I’m from the telephone company, and I 10 (send) here to connect your telephone.”
Experiments have proved that children can 1 (instruct) in swimming at a very early age. At a special swimming pool in Los Angeles, children become expert at 2 (hold) their breath under water even before they can walk. 3 (baby) of two months old do not appear to be reluctant to enter the water. It is not long 4 they are so accustomed to swimming 5 they can pick up weights from the floor of the pool. A game that is very popular with these young 6 (swim) is the underwater tricycle race. Tricycles are lined up on the floor of the pool seven feet under water. The children compete against each other to reach the other end of the pool. Many pedal their tricycles, 7 most of them prefer to push or drag them. Some children 8 cover the whole length of the pool 9 coming up for breath even once. Whether they will ever become future Olympic champions, only time will tell. Meanwhile, they should encourage 10 among us who cannot swim five yards before they are gasping for air.
Thirty-two people watched Kitty Genovese 1 (kill) right below their windows. She was 2 neighbor. Yet 3 of the 32 helped her. Not one even called the police.
John Barley and Bib Fatane went beyond the headlines to research into the reasons 4 people didn’t act. They found that a person has to go through two steps 5 he can help. First he has to notice that it is 6 emergency(紧急情况). Is the smoke coming into the room 7 a leak in the air conditioning? Is it “steam pipes”? Or is it really smoke from a fire? It’s not always easy to tell if you are faced with a real emergency. Second, and 8 important, the person faced with an emergency must feel personally 9 (responsibility). He must feel that he must help, 10 the person won’t get the help he needs.
We often think of future. We often wonder __1________ the world will be like in a hundred years’ time.
Think ___2_____ space. Perhaps a permanent station on the moon ___3_____ (set up). Perhaps people will be able to visit the moon as __4______. Cheap rockets for space travel will have been developed, __5______ (permit) long journeys through the solar system. When that time comes, people will be taking holidays in space and visiting __6_______ planets. Great progress will have been made _____7___ medicine, too. Pollution will have been controlled in a hundred years’ time.
__8________ the world will have been developed — even Antarctica. We will have used up most of the earth’s land to build our cities; __9_______ floating cities will have been built. The Japanese have already had plans of this kind. And there will be cities __10______ the sea.
