In the park, people were playing happily.

There is a possibility that an earthquake may happen.

I believe that he will succeed.

That black cat is considered an inauspicious omen.

His complexion caused a sense of bad luck.

Once upon a time, there was a big castle in this place.

A pit viper is a dangerous snake with venom.

In the old days, people believed that seeing a viper would bring bad luck.

In this mountain, you must be careful of mamushi.

Once, we used to play in the park every day.