题目

One October morning, the sky was clear and the sun was shining. Bethany Hamilton decided to go   41   with some friends in Hawaii. As one of the best teenage surfers in the world , the 13-year-old American girl was planning to become a  42  surfer. Cheerfully, she was lying on her surfboard ,waiting for the next big wave. Suddenly, a big shark   43   her left arm and shook her backwards  and forwards. Bethany held onto her board and the shark eventually swam away --- but it took her   44 __ away with it.   45  , it attacked only once. It happened so fast that she didn用一段长为36m的篱笆围成一个矩形菜园，则菜园的最大面积是_________平方米.