题目

综合填空 阅读下面短文，根据短文内容及首字母提示，在空白处填入一个适当的单词。 A young woman in her twenties was sitting on the train, next to her mother. They both looked tired but excited. The young woman was looking out (1) f_______ the train’s window. Suddenly, she shouted, “Mom, look, the trees are behind us!” Her voice was so (2) l________ that everyone on the train heard. Mom smiled. (3) B________ a young couple who were sitting nearby looked at the young woman’s childish(孩子气的) behavior with pity. “Poor girl. There must be som如图所示，AB是⊙O的直径，AB=AC，D，E在⊙O上，说明BD=DE．