He exposed the solar cells to sunlight to charge them.

She made a bowstring using horsehair.

Mr. Sone is my best friend.

They became in a relationship of mutual love.

He apologized to me sincerely.

This basin was used in ancient washrooms.

I have been to Hohhot.

We went on a trip on a big ship.

My great-grandfather was a great man.

The DJ crossfaded two songs to create a smooth transition.