I hate _______ when young people speak to the elderly in a rude way.
.—When can we come to visit you?—Anytime you feel like________.
Really great people always see the best in others; it is the little man who looks for the worst and finds_________.
.No one knows exactly when our ancestors started talking,but new evidence suggests _______might have happened a long time ago.
.—Do you think_____ worthwhile to go all the way to Los Angles to buy that computer?—Well ,I’m going to visit some relatives, too.
Though we found _____difficult to avoid economic and financial crisis, we must take measures to reduce its negative impact.