单选题We don"t have beds in the spacecraft, but we do have sleeping bags. During the day, when we are working, we leave the bags tied to the wall, out of the ways. At bedtime we untie them and take them wherever we"ve chosen to sleep. On most spacecraft flights everyone sleeps at the same time. No one has to stay awake to watch over the spacecraft; the craft"s computers call us on the radio. On the spacecraft, sleep-time doesn"t mean nighttime. During each ninety-minute orbit (轨道) the sun "rises" and shines through our windows for about fifty minutes, then it "sets" as the spacecraft takes us around the dark side of the Earth. To keep the sun out of our eyes, we wear black sleep masks. It is surprisingly easy to get comfortable and fall asleep in space. Every astronaut (宇航员) sleeps differently: some sleep upside down, some sideways, and some right side up. When it"s time to sleep, I take my bag, my sleep mask and my tape player with earphones and float (漂浮) up to the flight deck (驾驶舱). Then I get into the bag, and float in a sitting position just above a seat, right next to a window. Before I pull the mask down over my eyes, I relax for a while, listening to music and watching the Earth go by under me.

单选题Advertising is a method providing consumers, businesses and governments with information about specific goods, services or opportunities with ultimate goals of increasing sales.A) 广告是一种方法，提供给消费者、工商企业和政府信息关于商品、服务和有最终增加 销售目的机会。B) 广告是一种向消费者、工商企业和政府提供有关具体商品、服务或者有最终增加销售 目的机会的信息的办法。C) 广告是一种办法，提供消费者、工商企业和政府提供有关特别商品、服务或者有最终增 加销售目的机会。D) 广告是一种手段，它向消费者、工商企业和政府提供有关具体商品、服务或者机会的 信息，以达到最终增加销售的目的。

单选题Mr. Wilson ______ from his carving and eyed Edna severely.

单选题______ he comes, we will be able to go.

单选题The University of London Notes for International Students(外国学生入学须知) All applicants whose first language is not English are required to show that their ability to understand and express themselves in both written and spoken English is sufficiently high for them to benefit from their course of study. It is very important that international students do not make the journey to England'until they have been formally notified that they will be admitted to the university, and .until they are certain that they have suflicient funds to pay fbr their tuition fees and living expenses.

单选题Unless you give us a satisfactory explanation about quality, we will have no choice but to reject your goods.

单选题Seldom ______ any mistake during his past ten years of service there.

单选题Conversation 1

单选题The living room is spacious，wide and bright，bathed in a graceful atmosphere with a refreshing and natural style．The international direct dialing telephone lines ensure a smoothand unblocked information transmission．Separated famous brand air—conditioner，indoortelevision antenna(天线)，shower bathing ware and kitchen facilities，all make you enjoyhomely pleasure at any time．

单选题The boss still ______ in working ten hours a day in his office after leaving hospital.

单选题

单选题The light from the earth makes it possible for us to be able to see the parts of the moon which would otherwise be dark.

单选题They have to adjust in ______ way that they don"t make a loss.

单选题Much of a parent"s job is to provide the gifts of caring, love and emotional support to children. But one gift is often beyond their reach: the resources to meet the financial demands of college tuition. For more than 54 years, the United Negro College Fund has fulfilled the dreams of deserving students by closing the gap between the cost of college and what their parents can afford. More than 300,000 students have graduated from United Negro College Fund member college since 1944, and 54,000 more are currently enrolled (入学). The oldest and most successful minority higher education support organization, the United Negro College Fund, is a combination of 39 private, historically black member colleges and universities. Since its founding, it has raised more than $1.3 billion to keep the dream alive for needy families across the country. What is it that makes the United Negro College Fund so important to America"s families? As well as raising funds and giving technical support to member colleges and universities, it creates hope and opportunity by providing financial assistance to deserving students. Consider the contributions of just a few of the distinguished graduates who have realized the benefits: civil rights activist Dr. Martin Luther King, Jr.; opera diva Leontyne Price; Olympic track star Edwin Moses; and filmmaker Spike Lee.

单选题Of the two new teachers, one is experienced and______. A. the others are not B. another is inexperienced C. the other is not D. others are inexperienced

单选题The event was organized by two people, ______ of whom is a professional. A. each B. either C. neither D. every

单选题Watch your head! You ______ be more careful!

单选题A.Heisdiligent.B.Heisplayful.C.Heishelpful.D.Heisunfriendly.

单选题It's a pity that Professor Smith has failed to make his idea ______ in the classroom.A) understandingB) to be understoodC) understoodD) to understand

单选题Scientists everywhere are trying to ______ a cure for AIDS.