Ex. 13. Put special questions. Begin with the question-words given in brackets.

1. The computer is testing its basic units now. [What?]
2. We were solving the algebraic problem all the evening yesterday. [How long?]
3. Now, more and more companies are using the Internet to conduct their business. [Why?]
4. Our teacher will be speaking on the history of computers at the tomorrow's lecture [What?]
5. Many TV companies are converting to digital broadcasting now. [What broadcasting?]
6. The computer was performing arithmetic operations when you switched it off. [What operations?]
7. Software developers are expecting a boom in games played over the Internet. [What?]
8. It was already 9 p.m. but the experts were working still to restore the files. [Why?]