Problems about arithmetic series often appear in math tests.

I was bewildered by his sudden proposal.

He was perplexed by the problem.

A footrace was held at the school's sports festival.

Initially, I was against the plan, but now I understand its value.

Pop, what are you making today?

He conducted an experiment using an arc lamp.

We set up camp at the eastern tip of the island.

His actions are coming from a right reason.

That act is recognized as legal by law.