Humans and nature should coexist.

I think these teaching materials will be very useful for the students.

We decided to struggle together against the difficulties.

The head teacher plays a significant role in the operation of the school.

He picked up the shell that was lying on the ground.

A dinosaur is a type of extinct creature.

They performed together in a wonderful concert last night.

They performed together for the first time last night.

He threatened me and forced me to reveal the secret.

I felt a sense of wonder at his artwork.