idea

Learn • nouns • Session size: 10

Practice is designed to help you get familiar with the replacement words. Some sentences may have small grammar errors, and sometimes more than one answer could work—focus on choosing the best replacement word.

Question 1 / 10Score: 0

Boring sentence

The idea was that the moon's phases happen because we see it lit from different angles as it orbits Earth.

The ____ was that the moon's phases happen because we see it lit from different angles as it orbits Earth.