Once a boy came to ask a fisherman how to become cleverer, because his mother always called him foolish boy. "That's easy," answered the fisherman, " I know one way to make you become cleverer." "Really?" "Of course. It is said a fish head is good for brain . If you eat one, you'll become cleverer indeed. Pay only three pounds for one fish head." The boy paid him three pounds and the fisherman cut off a fish head and handed it to him. A raw  fish head is no good-not even for a hungry boy to eat but the boy ate it up in two gulps . "Do you feel anything?" asked the fisherman. "Not in my head," said the boy. The boy lay on the ground and thought, " One whole fish costs  only two pounds. I had paid him three pounds for the fish head, why couldn't I have the whole fish for the soup , a head of fish and one pound left over!" He jumped up and shouted at the fisherman. "You thief! You are fooling me!" The fisherman laughed, saying, " The fish head works now, you see." The boy paid three pounds. He could have   _  .
a whole fish and a fish head a whole fish and one pound back a fish head and one pound back a whole fish, a fish head and one pound back