【答案】D
【应试指导】事实细节题。从第一段第二句可知，当宇航员工作的时候，他们会把睡袋系在墙上。故D正确.
44. During sleeping time, the job of watching over the shuttle is done by
A. the shuttle' s radio
B. the shuttle' s warning bell
C. people working in the shuttle
D. engineers at the Control Office
【答案】D
【应试指导】事实细节题从第二段第二句可知，在宇航员睡觉期间，控制室的电脑和工程师会监视航天飞机。故D正确。
45. How often does the sun rise to people in the space shuttle?
A. Every 140 minutes.
B. Every 90 minutes.
C. Every 50 minutes.
D. Every 40 minutes.
【答案】B
【应试指导】事实细节题。从第三段第二句可知，在航天飞机环绕地球飞行的每90分钟里，太阳会升起一次。故B正确。
46. What do we know about people sleeping in the space shttle?
A. They sleep while listening to music.
B. They have difficulty falling asleep.
C. They sleep in different positions.
D. They go to sleep when it is dark.
【答案】C
【应试指导】事实细节题。从第四段第二句可知，航天飞机上的人睡觉的姿势是不同的，有的倒着，有的侧着，有的面朝上。故C正确。
D
You have probably seen ads (广告in newspapers or on TV for mail-order shopping. Perhapsyou have been sent a catalogue( 商品目录)and have bought something by mail. Why do people buythings they have not seen with their own eyes? One of the reasons might be that some people behevethat things can be bought more cheaply by mail. Another advantage of mail-order shopping is that itis more comfortable to sit at home and look through a catalogue than to rush around the stores. Withthe catalogue from a large company, you have your own shop window for almost everything you mightwant to buy.
The mail-order business is very wide-spread. Some companies hire people to show productslisted in the catalogue to possible customers.Perhaps you have had one of these people call you orcome by your home.
Buying from a catalogue is so easy. It saves the shopper time and trouble. Sometimes, it savesthe shopper money. But people often buy more than they can really afford, since they can buy nowand pay later on. Some companies allow a customer to pay for a product over a long period of time.People can also pay a certain percent of the total price. This is called a down payment. Then
thecustomer pays a certain amount of money every month until the product is completely paid for. People'can buy almost everything by mail-order shopping--furniture, tools and even heavy machines. 47. People prefer to buy things by mail-order because
A. they think the price is lower
B. they enjoy the shopping service
C. they can get catalogues they want
D. they can buy things from big companies
【答案】A
【应试指导】事实细节题。从第一段第四句可知，一些人认为通过邮购买的东西更便宜。故A正确。
48. What do we know about mail-order business from the text?
A. Mail-order shopping is very common nowadays.
B. Mail-order companies respect their customers.
C. Shopping by mail causes trouble to old people.
D. Companies spend a lot of money sending catalogues.
【答案】A
【应试指导】事实细节题。从第二段第一句可知，当今邮购业务发展得很普遍。故A正确。
49. What might be a big problem for mail-order customers?
A. It' s possible to get what they don' t like.
B. It' s easy to buy more than they can pay for.
C. They may fail to get what they have paid for.
D. They will wait for a long time to get the product.
【答案】B
【应试指导】事实细节题。从第三段第四句可知，对于选择邮购购物的顾客来说，他们很容易买到更多的他们没钱买的东西。故B正确。
50. What does \
A. The money a customer saves each month.
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