阅读下面短文,在空白处填入1个适当的单词或括号内单词的正确形式。
Far out in the ocean, where the water is as clear as glass, lives the Sea King. The ocean is too deep 1 (measure). We may imagine there is nothing except yellow sand under the sea, but actually it is not rare 2 (see) the most unique flowers and plants 3 (dance) in the fast-moving water. In the deepest spot of all stands the Sea King’s castle, which has walls of coral and a roof 4 (form) of beautiful shells. The mother of the king, a wise woman who is proud 5 (be) born into the royal family, takes care of his six daughters. Among the six sea-princesses, the youngest is the prettiest. Although she has delicate skin like a rose-leaf and eyes as blue as the deepest sea, she has no feet but a fish tail just like her sisters. The most common way for the princesses 6 (play) all day long is 7 (swim) in the halls of the castle or among the flowers growing out of the walls, feeding and touching the fish 8 (swim) up to their hands through the windows. They seem not 9 (worry) about anything, except for the youngest, who wants to see what life is like on land. She swims all the way to the surface and sees a large ship. It travels toward her at great speed and terrifies her. She swims below the surface of the water and just manages 10 (swim) away from the big ship. She now realises that it is a scary world outside of the ocean, and she decides to stay with her family and friends under the sea.