Question

Заполни пропуск I was interested ___________ learn about some of the more than 25,000 species of fish that live in Planet Earth's rivers, lakes and oceans. 1.to 2.on 3.in 4.--

Answer 1

I was interested TO learn about some of the more than 25,000 species of fish that live in Planet Earth's rivers, lakes and oceans

Answer 2

I was interested to learn about some of the more than 25,000 species of fish that live in Planet Earth's rivers, lakes and oceans. 

Answer 3

The correct answer to fill in the blank is "to".

I was interested to learn about some of the more than 25,000 species of fish that live in Planet Earth's rivers, lakes, and oceans.

The word "interested" is followed by the preposition "to" when expressing interest in doing something or learning about something. In this case, the speaker is interested in learning about the species of fish, so "to" is the appropriate preposition to use. [[1]]