.—Who______ it be that is knocking at the door? —It ______ be Father, but I’m not sure.
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.
.I found some old pictures at the back of my drawer which _____ memories of my childhood.