This problem is a piece of cake.

I'm sorry, I'm late.

He put the book away on the shelf.

Throwing away food scraps is a waste of food.

This restaurant offers an all-you-can-eat service on weekends.

No problem, I will do that job.

That proposal is completely unthinkable.

As a practical question, how are we going to fund this project?

A new approach is needed to solve this set of problems.

The main problem with this project is the lack of communication.