Yoshihiko is my best friend.

We are heading to the airfield.

He was playing by folding a paper aeroplane.

I have been to Mexico.

He was bored to death, so he decided to grind tea.

The defendant claimed innocence.

He stirred the fireplace fire with a poker.

He sat in the defendant's seat.

This base metal is oxidized by a chemical reaction.

I got wet in the rain yesterday and caught a cold.