6．
根据句子意思，用所给单词的适当形式填空。未提供单词的根据上下文填入适当的词。
Once there was a wise king. He had two sons. Every
day, many famous teachers taught (they) knowledge. One day, the king was
(bad) ill, so he wanted one of his sons (be) the new king.
He wanted to test his sons' (ability).
He called of them and gave each of
them a room. "You must fill this room completely anything you like.
But there should be no space left and don't ask anyone for advice!"
The next day the king visited the elder son's
room. The room was completely filled with hay(干草). The king sighed and
(feel) sad. Then he went to the (young) son's room, but it was kept closed.
The king knocked at the door of the room. The younger son asked his father to get
in and closed the door again. It was so dark that the king shouted at his son
(angry). But the younger son lighted a candle and said, "I have filled this
room with light!"
Now the king felt very happy and hugged his son
proudly. He understood that the younger son would be the right person to
(ruler) the kingdom after him.
