阅读下面材料，在空白处填入适当的内容（1个单词）或括号内单词的正确形式。
Long ago, there lived in Greece a 61 (learn) man. He was 62 well-known for his knowledge of almost everything that lots of people from all over the country came to learn from him. The great man taught his students whole-heartedly and answered their questions with great 63 (patient).
One day, a student asked him, “My dear teacher, didn’t you say you yourself have many more questions about things than we do? 64 I think we students have far more than you.”
With a smile on his face, the teacher 65 (draw) two circles, one as large as a big cake, the other smaller. Then he said, “Of course, I have learned much more. But 66 is wrong to think a teacher has fewer questions than his students. Now, look at these two circles. The inside of the bigger one is my knowledge of things, and the inside of the smaller one is 67 (you). Out of the circles is what is still unknown to us. Since mine is larger, I have 68 (use) the longer line to draw the bigger circle. That 69 (mean) I have more opportunities to face what is still unknown. And that’s why I myself have more questions than you do. The 70 (much) you learn, the more questions you have. You will never learn enough, you know.”
