He is an important employee of that company.

In the old days, people used to consider milk as an important source of nutrition.

The Earth is our home.

Tom was proud of his knowledge and wisdom.

My father is a doctor.

Daichi is my best friend.

He studies hard every day.

When a baby starts weaning, you begin to give them solid food little by little.

The baby has started to wean.

Day after day, he continued to strive to solve the problem.