Fill in the gaps with prepositions to, with, into, on, from, off, over, at, of, for if necessary, help please...
1. The developers conceived … a new model … machine.
2. The investors insisted … development … a new trend … computers.
3. The customers bought … the company new computers.
4. The company left their minicomputers … sale.
5. The computer helped perform a set … operations.
6. Software and peripherals are compatible … almost all modern computers.
7. Several applicants argue … the right to head the company.
8. The IBM Corporation capitalized … producing peripheral equipment.
9. We didn't forget the names … the scientists who have contributed … R&D.
10. Several devices aim … increasing the calculating speed.
11. We bought our computer … one of the shops of our city.
12. The firm used the money to buy … the cable television company.