I wrote the problem on the blackboard using chalk.

My dream is to climb Pekutusan.

A beautiful swan was swimming in the park's pond.

He has a spirit of fraternity.

This picture is drawn using gold leaf.

He wrapped the sandwich in tinfoil.

I wrapped the lunch box using aluminium foil.

This cloth will turn white by whitening in exposure to the sun.

My mother is whitening the laundry under the sun.

She decided to bleach her hair.