He has experienced the bitter liquid of life.

I am studying hard to get a scholarship for university.

I will turn 20 years old this year.

My younger sister will turn 20 years old this year.

The train was full.

Man is my best friend.

Since he is still a green hand, he may make many mistakes.

The Sheep is my favorite sheep.

The Sheep is my favorite sheep.

I think his behavior is immature.