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Lesson 51 Predicting the future 预测未来

Comprehension理解

Give short answers to these questions in your own words as far as possible. Use one complete sentence for each answer. www.xiao84.com

1  How have PCs affected the use of mainframe computers?

2  What was the first home computer called and when was it produced?

3  What did the first Personal Computer need to make it run?

Vocabulary词汇

Explain the meanings of the following words and phrases as they are used in the passage: predicting (1. 1);imagined (1. 2); whole (1. 7); functions (1. 9); primitive (1. 10); humble (1. 14); in common use (1. 15)

Summary writing摘要写作

In not more than 80 words describe what computer developments Leon Bagrit was able to predict and what he failed to predict. Do not include anything that is not in the last paragraph.

Composition作文

Write a Composition in about 300 words on one of the following:

a  Predict the next 20 years in computer development.

b  Describe your attitude to computers and give reasons for it.

Letter writing书信写作

You have arranged to place your house at the disposal of a friend of yours while you are away on holiday. You are now about to leave. Write him or her a letter in about 100 words telling him or her what final arrangements you have made.

Key structuresandSpecial difficulties关键句型和难点

Rewrite the following sentence without changing the meaning. Then refer to 11. 6-8.

Indeed very large were those mainframe computers which often occupied whole air-conditioned rooms, were required to employ full-time technicians and ran on specially-written software.

Mainframe computers…

Multiple choice questions多项选译题

Choose the correct answers to the following questions.

Comprehension理解

1  In the mid 1970s, computers were ______ .

a.notoriously unreliable

b.rather rare

c.in widespread use

d.not at all common

2  The importance of the Altair was that it ______ .

a.did not need specially-written software to run it

b.put computing power within the reach of ordinary people

c.helped to establish Microsoft DOS as the standard system

d.was widely copied by IBM and other big manufacturers

3  Leon Bagrit foresaw that before long ______ .

a.we would be able to teach computers to think like human beings

b.computers would bring about the development of the Internet

c.computers in hospitals would diagnose illnesses and prescribe treatments

d.computers in commerce would take over many repetitive tasks

4  Leon Bagrit's most important insight into the future development of computers was in terms of their ______ .

a.ability to relieve people of boring tasks

b.size, power and cost

c.use in traffic management

d.commonplace use in offices and hospitals

Structure 结构

5  It is notoriously difficult ______ the future. (1. 1)

a.when predicting

b.the prediction of

c.to predict

d.that we predict

6  Who could have imagined that ______ as many computers as TV sets? (11. 1-4)

a.there would be

b.there to be

c.their being

d.there were

7  People in those days liked to believe in computers ______ the world. (11. 18-19)

a.taking over and ruling

b.that took over and ruled

c.take over and rule

d.to take over and rule

8  ______ Bagrit's predictions so remarkable is their accuracy. (1. 28)

a.What makes

b.Why are

c.How many are

d.They make

Vocabulary 词汇

9  Bagrit ______ the idea that computers would rule the world. (11. 18-19)

a.refuted

b.refused

c.rejected

d.discharged

10  Bagrit foresaw that computers would become ______ small to hold in the hand. (11. 19-20)

a.adequately

b.sufficiently

c.capably

d.possibly

11  All these computer uses have become ______ . (11. 22-23)

a.relatively normal

b.more or less frequent

c.taken for granted

d.unexceptionable

12  The Internet enables us to ______ instantly with anyone in any part of the world. (11. 24-25)

a.get in touch

b.contact

c.send a message

d.convey an idea