31. What wears a cap but has no head?

　　A bottle.

　　32. What rises in the morning and waves all day?

　　A flag.

　　33. What is an astronomer?(天文学家)?

　　A night watchman with a college education.

　　34. How can you tell clocks and watches are shy?

　　Because they always have their hands in front of their faces.

　　35. What is wind?

　　Air in a hurry.

　　36. What comes after the letter "A"?

　　All the other letters.

　　37. What starts with a T, ends with a T, and is full of T?

　　Teapot.

　　38. What word can you make shorter by adding to it?

　　Short.

　　39. What person does every man take his hat off to?

　　A barber.

　　40. Why does the boy carry a ladder to the school?

　　Because he wants to go to high school.