He was born fourth among the quadruplets.

April is the season of spring.

My family consists of four people.

My body has become flexible by doing stretching exercises every morning.

He used a metal detector to search for treasure on the beach.

We worked together to achieve our goal.

He encrypted the message using a public key.

We held a meeting at the town hall.

I am busy with work during the daytime.

The eighth day of every month is my birthday.