There is a mother duck. She la

There is a mother duck. She lays(下蛋)three eggs. Soon, there are three baby birds. Two of the birds are very beautiful. One of them is quite ugly. The beautiful ducklings make fun of their ugly brother. The poor duckling is very unhappy. As the three birds grow older, the ugly duckling begins to change(变化). His grey feathers(羽毛) turn snowy white. His gangly(细长的) neck becomes beautifully smooth(文雅的). In early spring, the ugly duckling is swimming in a small pond. He sees his shimmering reflection in the clear water. What a great surprise! He is no longer an ugly ducking. He has grown into a lovely swan. Fill in the blanks: I、Mother duck lays 1 2 . II、Two of the birds are very 3 . One of them is quite 4 . III、As the three birds grow 5 , the ugly duckling 6 to change(变化). IV、His 7 feathers(羽毛) turn snowy white. His gangly(细长的) neck becomes 8 smooth(文雅的). V、In early spring, the ugly duckling is 9 in a small pond.
阅读理解，根据内容填空