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.

That man-child is still living in his parents' house.

He is called a 'kid's room uncle', and is alienated from society.

My new electric vacuum cleaner is very quiet, making cleaning easier.

I reserved a single room.