Torazo is my best friend.

He is good at making ice sculptures.

I saw a large snow sculpture in the park.

My mother wipes the floor with a rag every day to keep the house clean.

My mother was wiping down the kitchen floor with a rag.

Linear programming is a part of operations research and is used to find the optimal solution.

Paying the urban planning tax is a citizen's duty.

The United Nations Environment Programme is providing solutions to global environmental problems.

He greatly respects ivory carvings.

Elephants have big ears and a long nose.