Q: Keywords: maintenance, pond, pool
What is a sentence that includes all these keywords?

A: natural pools are a swimming pool and pond combined that require no chemicals and very little maintenance .

Q: Keywords: board, flour, heart
What is a sentence that includes all these keywords?

A: heart of white flour on a wooden board .

Q: Keywords: fly, jet, runway
What is a sentence that includes all these keywords?

A:
A jet flying over an airport runway with it's landing gear down..