Alice kept perfectly still, ______ that the dog might attack her. “It was the most ______ experience of my life,” she told me later.

—That was a           question, How did you get it right?—I just tried my luck

 “This book is ______ more useful for us students.” “Yes, but it is _______ too difficult.”

At first driving requires a lot of concentration, but over time, it just becomes_____.

 He is ______ to come back tonight. Then we’ll have a small party.