南大网络大学英语(英语统考B上)unit-5习题答案

【答案】B

8. Home computers can be used for _________.

A.writing letters

B.playing games

C.doing business

D.all of the above 【批阅】回答正确！ 【答案】B

9. Salesmen use computers mainly to _________.

A.check the list of goods and materials that are kept in the store house

B.play games for pleasure

C.talk with their friends

D.write letters 【批阅】回答正确！ 【答案】D

10. The best title for the passage would be _________.

A.New Uses for Computers

B.The Popularity of Home Computers

C.The Home Computer Industry

D.Computers at Home 【批阅】回答正确！ 【答案】A Passage 2

Do you find getting up in the morning so difficult that it becomes painful? This might be called laziness, but Dr. Kleitman has a new explanation. He has proved that everyone has a daily energy circle.

During the hours when you labor through your work you may say that you are “hot”. That’s true. The time of day when you feel most energetic is when your cycle of body temperature is at its peak. For some people the peak comes during the forenoon. For others it comes in the afternoon or evening. Not one has discovered why this is so, but it leads to such familiar monologues（自言自语）as “Get up, John! You’ll be late for work again!” The possible explanation to the trouble is that John is at his temperature-and-energy peak（最高点）in the evening. Much family quarrelling ends when husbands and wives realize what these energy cycles mean, and which cycle each member of the family has.

You can’t change your energy cycle, but you can learn to make your life fit it better. Habit can help, Dr. Kleitman believes. Maybe you’re sleepy in the evening but feel you must stay up late anyway. Counteract（对抗）your cycle to some extent by habitually staying up later than you want to. If your energy is low in the morning but you have an important job to do in the day, rise before your usual hour. This won’t change your cycle, but you will get up steam（鼓起干劲）and work better at your low point.

Get off to a slow start which saves your energy. Get up with a leisurely yawn and stretch. Sit on the edge of the bed a minute before putting your feet on the floor. Avoid the trouble some search for clean clothes by laying them out the night before. Whenever possible, do routine work（常规工作）in the afternoon and save tasks requiring more energy or concentration for your sharper hours.

11.If a person finds getting up early a problem, most probably _________.

A.he is a lazy person

B.he refuses to follow his own energy cycle

C.he is not sure when his energy is low

D.he is at his peak in the afternoon or evening

【批阅】回答正确！ 【答案】A

12. Which of the following may lead to family quarrels according to the passage?

A.Unawareness of energy cycles.

B.Familiar monologues.

C.A change in a family member’s energy cycle.

D.Attempts to control the energy cycle of other family members. 【批阅】回答正确！ 【答案】D

13.If one wants to work more efficiently at his low point in the morning, he should _________.

A.change his energy cycle

B.get up earlier than usual

C.overcome his laziness

D.go to bed earlier 【批阅】回答正确！ 【答案】A

14.You are advised to rise with a yawn and stretch because it will _________.

A.help to keep you energetic for the day’s work

B.help you to control your temper early in the day

C.enable you to concentrate on your routine work

D.keep your energy cycle under control all day 【批阅】回答正确！ 【答案】B

15.Which of the following statements is NOT TRUE?

A.Getting off to work with a minimum effort helps save one’s energy.

B.Dr. Kleitman explains why people reach their peak at different hours of day.

C.Habit helps a person adapt to his own energy cycle.

D.Children have energy cycles, too 【批阅】回答正确！ 【答案】A

语法词汇（共5小题，每小题4分，满分20分）

16. ----Are you going to Jeff’s party?

----I’m not sure. I ________ go to the concert instead.

A.must

B.would

C.should

D.might

【批阅】回答正确！ 【答案】D

17. I was really anxious about you. You ________ home without a word.

A.mustn’t leave

B.shouldn’t have left

C.couldn’t have left

D.needn’t have 【批阅】回答正确！