The mayor attended the opening ceremony of the new park today.

I submitted a petition to the mayor asking for the preservation of the park.

We petitioned the mayor for improvements to the park.

The submission of the report is due tomorrow.

Please submit the report by tomorrow.

He continued his journey to find the truth.

The maintenance of this park is our responsibility.

We have a responsibility to conserve the natural environment.

We had a picnic in the park.

He started calculating to obtain the ratio of the two numbers.