He received a letter of threat.

He threatened me and forced me to reveal the secret.

My zodiac sign is Aries.

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

My favorite poet is Hakushu.

Hakushu's poetry had a great influence on Japanese literature.

I wrapped the lunch box using aluminium foil.

He surprised his opponent in the tennis match by using a backhand stroke.

This cloth becomes whitened when exposed to the sun.

I hung the laundry under the sun to whiten it by exposure.