This cloth becomes whitened when exposed to the sun.

Her dress was pure white and it was very beautiful.

Her eyes were shining like amber.

I often go to the museum to study natural history.

He is working hard to complete his doctoral dissertation.

He is a famous earl in England.

He threatened me and forced me to reveal the secret.

He received a letter of threat.

His lie was clearly evident.

His research is drawing society's attention to environmental issues.