填空题。

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     Long ago, there lived a learned man in Greece. He was well-known               (1) his wide

knowledge. And lots of people from all over the country came to               (2) things from him.

The great man taught his students with all his heart and               (3) their questions with great patience.

     One day a student               (4) him, "My dear teacher, didn't you say you have many more

questions than we do? But we think we students have a lot more than you." With a               (5), the

teacher drew two circles - one is as               (6) as a big plate ( 盘子), and the other smaller.

"Of course, I've learned much more. But I don't think I know all you know. Now, look at these two

circles. Inside the big one is my knowledge of things,               (7) inside the smaller one yours. Out

of the circles is what we don't know. My circle is larger, so its line is longer. That               (8) I have

more opportunities to meet with what we don't know. And that's               (9) I myself have more

questions than you do. The more you learn, the more               (10) you'll have. You will never learn

enough, you know."