单选题What may be the result if we can not hear ourselves think?

单选题Although he was ill, ______ he went on working.

单选题In what now seems like the prehistoric times of computer history, the earth's postwar era, there was quite a wide-spread concern that computers would take over the world from man one day. Already today, less than forty years later, as computers are relieving us of more and more of the routine tasks in business and in our personal lives, we are faced with a less dramatic but also less foreseen problem. People tend to be over-trusting of computers and are reluctant to challenge their authority. Indeed, they behave as if they were hardly aware that wrong buttons may be pushed, or that a computer may simply malfunction. Obviously, there would be no point in investing in a computer if you had to check all its answers, but people should also rely on their own internal computers and check the machine when they have the feeling that something has gone wrong. Questioning and routine double-checks must continue to be as much a part of good business as they were in pre-computer days. Maybe each computer may provide; it should not be seen as a substitute for fundamental thinking and reasoning skills.

单选题Many deaf people in the United States do use a special telephone system. It is called TDD. The letters TDD represent the words Telecommunication Device for the Deaf. One kind of TDD looks like a small typewriter. It has rows of buttons. Each button is marked with a letter. Messages are spelled out by pushing the correct buttons. The TDD connects to a telephone through a device called a modem. The modem changes electronic signals from TDD into sounds the telephone can understand. Some TDDs produce messages on paper. Others show them on a television or computer screen. For example, a deaf gift named Linda wants to call her boy friend, Mark, who is also deaf. First, Linda puts the telephone receiver into the modem. Then she calls Mark"s telephone number by pushing the correct numbered buttons on the telephone. A light on her TDD shows that Mark"s telephone is ringing. A different light will show if Mark"s telephone is used. Linda will have to wait to call later. If Mark"s telephone is not used, he will see a light going on and off. Then he will know that some one is trying to call him.

单选题HowlonghasthespeakerbeeninFinland?

单选题This leaflet(宣传单)is trying to

单选题Whatdoesthespeakerdomostprobably?

单选题--My cousin sent me a wonderful gift from Africa.--Oh, is that so? ______?

单选题It is necessary that a student______his lesson before coming to class.[A] will prepare[B] prepares[C] must prepare[D] prepare

单选题Since the middle of this century ______ has been learned about space than in all human history before that time. A. much B. more C. better D. a lot

单选题How ____ they be there already? They only left ten minutes ago.

单选题No sooner had they got the goods covered up ______ it started raining hard.

单选题When birds came to the garden, the monkey chased them away. The verb "chased" means__________.

单选题In the United States, boys and girls start school when they are five years old. In some states they must stay in school until they are sixteen. Most students are seventeen years old when they graduate from secondary school (中学). Another name for secondary school is high school. Most children go to public elementary schools (小学) and secondary schools. The par- ents of public school pupils do not have to pay directly for these children's education be- cause tax money supports the public schools. If a child attends a private school, his parents pay the school for the child's education. Today about half of the high school graduates go on to colleges and universities. Some colleges and universities receive tax money from the government. A student at a state university does not have to pay much if his parents live in that state. Private colleges and universities are expensive, however. Almost half of college students in the United States work while they are studying. When a student's family is not rich, he has to earn money for part of his college expenses.

单选题阅读下列短文，从每题所给的四个选项(A、B、c和D)中选出最佳选项。{{B}}A{{/B}} One day ,I happened to(碰巧)talk to a stranger on the bus. When he found out that I was from Chicago, he told me that one of his good friends lived there and he wondered if I happened to know him. At first I wanted to say that Chicago was a very big city. He was silent(沉默)for a few minutes, and then he began to tell me all about his friend. He told me that his friend was an excellent tennis player, and that he even had his own tennis eourt(网球场). He added that he knew a lot of people with swimming pools, but that he only knew two people in the country had their own tennis courts. And his friend in Chicago was one of them. I told him that I knew several people like that. For example, my brother and my next door neighbour. I said that my brother was a doctor. The doctor had a tennis court. I told him that my next door neighbour went to Sacramento last summer and lived in the house next to my brother's. For a moment, we looked at each other. But we did not say anything. "Would your friend's name happen to be Roland Kirkwood?" I asked finally. He laughed and said, "Would your brother's name happen to be Dr. Ray Hunter?" It was my turn to laugh.