英語謎語：Why did the teacher wear sunglasses to class?

英語謎語ZT

1. What kind of tree is always ready to shake hands?

Palm. （palm: 棕櫚樹; 手掌）

2. Why did the teacher wear sunglasses to class?

Because her students were very bright. （bright: 聰明的；明亮耀眼的）

3. Why do astronauts worry about their jobs?
Every time they're sent into space, they're fired. （be fired: 解雇；被發射）