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Exercises



Main idea

Which statement best expresses the main idea of the text? Why did you eliminate the other choices?

 1. Hybrid computers are a combination of digital and analog computers.

 2. Digital computers are used more than any other type of computer.

 3. There are three types of mainframes.

 4. Analog computers can do more varied work than digital or hybrid computers.

Understanding the passage

Decide whether the following sentences are true or false (T/F) by referring to the information in the text. Then make the necessary changes so that the false statements become true.

T F

  1. A mainframe is the type of computer that can sit on top of a desk.

  2. Mainframes are very powerful and can execute jobs very rapidly and easily.

  3. Digital computers are used more than analog computers.

  4. The analog computer is far smaller than a digital computer and therefore occupies very little space.

  5. The hybrid computer is a combination of both the digital and the analog computer.

  6. The analog computer does its calculations one step at a time.


T F

  7. The digital computer continuously works out calculations.

  8. Mainframes are huge powerful machines whose peripheral equipment takes up a lot of space.

  9. Mainframes are expensive to buy and to operate.

  10. Mainframe technology has reached the end of the road. No further development is needed.

Locating information

Find the passages in the text where the following ideas are expressed. Give the line references.

........... 1. Smaller computers may take longer to perform an operation.

........... 2. More technological development is necessary in the

mechanical devices associated with computer systems.
........... 3. Mainframes can operate quickly and execute more complex

instructions.
........... 4. The hybrid computer is a combination of both digital and

analog computers.

........... 5. Digital computers are used more than analog computers.

........... 6. Mainframes are large powerful computers.

........... 7. An analog computer is comparable to a car speedometer in

the way it operates.
........... 8. Digital computers do calculations, one after another,

quickly and exactly.

Contextual reference

Look back at the text and find out what the words in boldtypeface refer to.

1. whichcan be executed (1-7)

2. as itis often known (I. 12)................................

3. thatare presented to it (I. 14)

4. in that itcan do calculations (I. 16) ...............................

5. in that itcontinuously works out (1.20)

6. Bothof these computer types (1.23)

7. thatmay require a large room (/. 24)

8. thatcombines the two types (I. 29)

9. require special provision for

theirhousing (/. 31)
10. thatruns into thousands of

dollars (/. 37) ...............................





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