用括号内所给动词的适当形式填空，必要进可加助动词或情态动词。
Have you over soon Korean (朝鲜的) wrlting before?In many people 's eyes it 1 (look)lovely but difficult. Do you know the history of the apeciml lettera?
Longa ago, Korean people 2 (not own)their lotters.At that time.they used Chincac cheraoters (汉字).
Because Chinese is hard to leam, only rich people had the money and time to ask tlachens 3 (toach)them.
One of their kinga (国王)was called Sejong. He decided loinvent Korean Letters, He 4 (think) hard, One day,
on October 9,1446,he looked at a win-dow frans (窗框) and shouted.
