短文填空。
There was once an old man who had four sons. He wanted his sons to learn not to judge（判断）things too q      . So he sent them, in turn, to go and look at a pear tree far away.
The first son went in the winter, the second in the spring, the third in the summer, and the youngest son in the f     .
When the sons had all gone and come back, the old man called them together and asked them to d      what they had seen.
The first son said that the tree was ugly and bald, but the second son said no---the tree was covered w      green buds (花蕾). The third son shook his head and said that the tree was f     of flowers, and smelled so sweet, looked so beautiful that he thought it was the most wonderful thing he had e     seen.
The youngest son didn’t a       with all his brothers. He said that there were so many fruits on it.
The old man then e     to his son that they were all right, b   they had each seen only one season in the tree’s life. He told them not to judge a life by one difficult season.
If you give up when it’s winter, you will miss the hope of your spring, the b      of your summer, and the harvest (丰收) of your autumn.