We should keep it in mind that beneath our feet ______ that our life depends on for food and clothing.
It is often said that _______ teachers have ______ very easy life.
____is known to all, good friends _________ happiness and value to life.
Although he talked half an hour, he couldn't give us a good ________ of the reason why he did it.
The horrible noise from the man's room simply _____ me mad.
Professor White has written some short stories, but he is ______known for his plays.(NMET 1998)