The flags of all nations are fluttering in the wind.

Just in case he fails the exam, what should we do?

Mr. Aman is my best friend.

Makoto is my best friend.

This park is open to everybody.

He is knowledgeable in all fields of learning.

He likes to take a walk in the park at dusk.

I find my new fountain pen easy to write with, and I really like it.

He is the type of person who thinks it's a moonlit night if it's bright, so he only has a one-sided perspective.

He thought deeply and said, 'I think, therefore I am.'