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they  surprise  he  other  no  what  easy  hard  prepare  toy  do     allow

There are two twin brothers in a family .One was an optimist and the   was a pessimist. The parents were worried about   behavior and attitude, and finally took the boys to see a psychologist( 心理学家).
The psychologist looked over them for a while ,and then he said， “They can       be helped.”  He told the parents to prepare a room filled with all the      that a boy could want .They should put the pessimist boy in that room and      him to enjoy life. They also needed to     another room and fill it with horse manure(马粪). They should put the optimist boy in that room. They       this, and then watched both boys through one-way mirrors.
The pessimist continued to be a pessimist. He said that he had     one to play with.
They went to look at the optimist, and were    to see him digging through the manure.
The psychologist ran into the room and asked    the boy was doing. He looked up through the manure and said， “I am sure there must be a horse in the room somewhere.”