（单词翻译:单击）
A pigeon severely1 pressed by thirst，seeing a glass of water painted upon a sign，supposed it to be real．So dashing down at it with all her might，struck against the board，and，breaking her wing，fell helpless to the groud，where she was quickly captured by one of the passers-by．Great haste is not always good speed．Exercises：
回答下列问题：
① What did the thirsty pigeon see？
② What happened to the pigeon at last？
③ What can we learn from the pigeon？
