用括号里所给动词的适当形式填空，必要时可加助动词或情态动词。
Have you ever seen Korean writing before? In many people's eyes it 1. (look) lovely but
difficult. Do you know the history of the special letters?
Long ago, Korean people 2. (not own) their letters. At that time, they used Chinese
characters (文字). Because Chinese is hard to learn, only rich people had the money and time to ask
teachers 3. (teach) them. One of their kings was called Sejong. He decided to invent Korean
letters. He 4. (think) hard. One day, on October 9, 1446, he looked at a window frame (窗框)
and shouted, "I know what our letters should be!" He got the idea from the frame and invented letters
of all the same size. It seemed that they 5. (put) in a window frame. The earliest Korean letters
were born. King Sejong said, "Chinese characters can't express (表达) Korean meanings. Now I
6. (invent) our own letters. These letters are very easy to learn. I hope that they 7.
(help) all people learn to read."
When King Sejong first invented the Korean letters, they had 28 letters, but only 24 are used today.
All the Korean people enjoy 8. (use) their own letters.