IV. Підкресліть інфінітив, визначте його функцію. Речення перекладіть.

1. The scientist was the first to describe the phenomenon.

2. To find the mass of the electron was then of prime importance.

3. This method was not accurate enough to give reliable results.

4. They promised to speed up the loading to avoid delay in delivery.

5. The main purpose of trade by auctions is to sell goods to the highest bidder.