A Bird Startled by the Mere Twang of a Bow-String
　　During the Warring States Period ,in the Wei State there lived a famous archer named Geng Lei. One day, Geng Lei and the King of Wei ________ on a high terrace saw some birds flying past._______ this ，Geng Lei said to the King:"I'll shoot a flying bird down for Your Majesty by drawing a bow with no arrow." The King asked, "Is it possible _______ one's archery can attain such a level?" A little later, ______ wild goose was flying from the east. Geng Lei just drew ________ bow but didn't shoot an arrow. As expected, the wild goose fell to the ground with the twang.
The King asked in surprise, "How can your archery reach such a high level?"
Geng Lei replied ,"This wild goose __________."
　　The King got _________(much) surprised, asking, "How do you know it, sir?"　
　  Geng Lei explained, "This wild goose flew slowly and cried _______. Its flying slowly suggested that it was still aching with the old wound; its crying sadly suggested that it had strayed long from its flock. _______ it heard the twang the wild goose had to flutter hard to fly high for its life. So it is evitably fell down with its old wound burst."
This set phrase figuratively denotes those ________ have suffered disasters and so have a lingering fear when anything happen.