Ex. 7. Replace the statements given in brackets by one word from your active vocabulary.

1. In the past, [cards on which information was recorded as a pattern of holes] were used for putting information into a computer.

2. [A liquid changed into a gas] as the tractive power was introduced on the railways in the 18^th century.

3. It's [extremely important and necessary] that you wear protective clothing in this area.

4. The 45 year-old [person who travels to unknown places in order to find out more about them] is preparing for his new expedition to the Arctic.

5. We had to [stop doing something, especially before it is finished] this long-term research project because there were problems with financing.

6. A computer is a machine, which is [having the ability or qualities necessary for doing something] of storing and manipulating numbers, letters and characters.

7. Babbage's computing machine was the [earlier thing that had a role or function similar to somebody or something coming later] of the modern computer.