D The frightened bird
导读：同学们，上一个单元我们学的成语叫“滥竽充数”！你们读懂了吗？今天读的这个成语故事和一只受伤的鸟有关。为什么这只鸟听到弓弦声，就从天空跌落下来？读一读这个故事吧！
There is an archer named Geng Lei in the State of Wei.
One day, he goes travelling with the King of Wei.
At that time a bird is flying around in the sky, giving out sad and loud cries now and then.
The King of Wei looks up at it for a while and says to Geng Lei, "Do you see that bird? Can you shoot it down?"

"I can shoot it down without an arrow," Geng Lei says.
After a while, the bird flies near.
Geng Lei pulls his bow and "shoots". At the sound, the bird falls to the ground.
The King of Wei says in surprise, "You can shoot down a bird without an arrow. Your skill is really wonderful."

Geng Lei then explains, "The bird is flying low and slow because it is hurt. The bird is crying in a bitter tone because it loses its companions. Hearing the sound of the bowstring, it thinks it is shot, so it gives up."
我来试试
根据故事内容回答问题。
1.由这个故事而来的成语是什么？

2. Why can Geng Lei shoot the bird down without an arrow?

1. 惊弓之鸟
2. Because the bird is hurt and loses its companions. When it hears the sound of the bowstring, it thinks it is shot, so it gives up and falls to the ground.

1. 该故事是经典的成语故事，结合故事内容可确定对应的成语。2. 从文中Geng Lei的解释中提取关键信息，用符合四年级英语水平的语句组织答案即可。