Fill in the gaps with prepositions to, with, into, on, from, off, over, at, of, for if necessary, help please...

Question

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.

Ильина Ксения · Accepted Answer

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