He is teaching mathematics to the students.

Oil is an important element of the world economy.

She played the piano with her fingertips.

This lamp used to light up with whale oil in the past.

My mother attends a tea ceremony class every week.

Miyu is my best friend.

This machine operates using a special oil solution.

He is trying to get a promotion by flattering his boss.

She was sewing using a thimble.

I take fish oil every day.