Don’t waste words on him. He is so ______ that you can’t expect him to change his mind.

____ is your father –He is fine. Thank you.

You had better not open the windows in such freezing weather.–_____.

It may be 5 or 10 years __________ it is possible forpeople to find a space station on the moon.

In dealing with public relations,we should make every effort to prevent the __________ in personality.