Innovation is the key to success in today's competitive market.

I watched an interesting video last night.

This book contains beautiful illustrations.

Let me give you a brief introduction of John to Mary.

The sentence is grammatically correct.

The general situation is advantageous to us.

It was believed that the earth was flat.

I need luck to pass the exam.

The basis of his argument was fundamentally flawed.

The woman was walking along the street.