You are __________ careful than your brother. You two can't do the work that needs care and skill.
Trust him please! When he _______ reading it, he will return the book to you on time.
He is my father and I know he will forgive me for _______ I have done.
Charles is believed_______ the floor yesterday; he is always helping others silently.
The _____ of electricity added to our difficulty repairing the bridge.
After her son died in a car accident, the old lady would sit at the window, ______ out and _______ in thought.