Ex. 17. Match the if-clauses (1 to 6) to the main clauses (a to f) to make complete sentences.

1. If the Apple Computer company had not introduced the GUI,… 2. If you or I add up two numbers of six figures without a calculator,... 3. If you had chosen a more complicated program,… 4. If I had the time,... 5. If robots are more widely used in industry,… 6. If we had an access to the database,… a) your computer would have solved this problem. b) I would help you to solve the problem. But I must be off. c) their Macintosh computer would not have been successful. d) it will take us a lot of time. e) we would find the required information quickly. f) the number of workers will be reduced.