Last summer, Jeff became a middle school student. He was a good student, and he always worked hard. He had a test in the first month and he finished the questions easily until he read the last one:” 小题1: What’s her name?” Of course, this question was a little special. 小题2: She was tall and her hair was dark. But Jeff didn’t talk with her and didn’t know her name. The test was over. 小题3: Then a student asked the teacher, “Is the last question very important in this test?” “Yes,” said the teacher. “In our life, we will meet many hard-working people. They are important. 小题4: We may smile at them or say hello to them. 小题5: He also learned that woman’s name later. It was Kathy. 根据材料内容，从下面五个选项中选出能填入文中空缺处的最佳选项，使短文意思通顺，内容完整，并将其标号填写在下面题号后的横线上。