Have you ever seen a rainbow in the park?

He was traveling alone in the wilderness.

I love listening to symphony orchestras.

I have been to Hengchun.

We enjoyed fishing at the fishing port on the weekend.

His business is going smoothly.

They participated in an orgy party.

He chose to participate in an orgy.

This ship will make its maiden voyage next week.

He explained to me in detail about the constellations of the zodiac.