From his visual angle, the problem looks completely different.

He reflected upon his actions and thought deeply about the results.

He reflected upon his past and decided to change his actions.

When the visitor came, I was not at home.

Who wrote the script for this movie?

A large audience gathered at yesterday's concert.

He is just a window-shopper, he has no intention of buying anything.

The caller has arrived, so please tidy up the room.

This drink has been refrigerated and is very cold.

Please put the beer in the refrigerator to refrigerate it.