51. What is the best thing to keep in hot weather?

　　Cool!

　　52. What is never used until it's broken?

　　An egg.

　　53. What's a skeleton?(骨架)

　　It's a lot of bones without the person on them!

　　54. What is dark but made by light?

　　A shadow.

　　55. What can you break with only one word?

　　Silence.

　　56. What stays indoors no matter how many times you put it out?

　　The light.

　　57. A policeman saw a truck driver going the wrong way down a one-way street, but didn't give him a ticket. Why?

　　Because the truck driver was walking.

　　58. Where can milk be best stored?

　　In a cow.

　　59. Which can move faster, heat or cold?

　　Heat, because you can catch cold easily.

　　60. What's the hardest thing about learning skating?

　　The ice.