Once upon a time， there lived a teacher In a small town. He often taught his students in special ways. Once he Rent four of his students to go to a small farm to see apple trees in different seasons. The first student went in winter， the second in spring. The third in summer. And the last in autumn.After the four students came back .the teacher called them together. They pictured (描述) their feeling to the teacher. The first student said that there were no leaves on the trees. It made him very disappointed. The second student said his eyes were full of light green. It made him feel hope