The researchers found clear and convincing evidence _________ happiness is the key when it comes to better health and longer lives.
At first, we didn't know about Tom. But ____, we came to know that he was an honest boy.
Almost all job applicants are determined to leave a good ___on a potential employer.
She has good eyesight. She can see ____ the distant island in the sea.
It is obvious that water is to be _____to the development of life.
He has behaved in the most extraordinary way recently. I wonder what can_____ his actions.