As is often pointed out, knowledge is a two-edged weapon which can be used ________ for good or evil.
She was so tired from the flight that she went straight to bed, leaving all the luggage _____.
John is a warm-hearted man. It is _____ of him to give a helping hand when people are in trouble.
I finally got the job I dreamed about. Never in my life _____ so happy.
He is always ready to help others, seldom, _____, refusing them when they turn to him.
After greetings the teacher said to his students, “Today we will _____ the lesson where we left off yesterday.”