1.Where's the John?Oh,over there.This way,please.What does "the John" mean?

WC.

2.How can you spell "hard water"only using three letters

Ice.

3.What man cannot be in a warm house?

Snowman.

4.What is black when it is clean but white when it is dirty?

Blackboard.

5.Why do people frrl stronger on Sundays?

Because all the other days are week(weak)-days.

6.What can be found once every minute, twice every moment, but not once in a thousand year?

M.

7.There is a word. Its first letter is in "book", but not in "look". Its second letter is in "ink",but not in "thank".Its third letter is in both"ink"and"book".Its last letter is not in"ship", but in "sheep".What is it ?

Bike.

8.What's the end of the world?

D.

9.what did the fly say when it landed on the book?

I don't know.

10.What is 10+5 minus 15? what is 3+6 minus 9? what is 17+3 minus 20?

0.

11.If wife went to Washing while Washington's washwoman Washington's Washington's woollies ,how many W's are there in the all?

Only one.

12. What weather do mice and rats fear?

When it’s raining cats and dogs. (注:rain cats and dogs意为"瓢泼大雨". )

13.What question can never be answered by “yes”?

Are you asleep?

14.What kind of table has no legs?

Time table.

15.Which runs faster,heat or cold?

Heat,becase you can catch a cold.

16.What letter is a question?

Y.

17.Why does time fly?

To get away from all those who are trying to kill it.

18.From what number can you take half and leave nothing?

8.

19.Which 5-letter word has 6 letters left when you take 2 letters away?

Sixty.

20.what number gets bigger when you turn it upside down?

6.

21.What word can be seen if I jump into the water?

Waiter.

22.What has a tongue but can not speak?

Hats(鸭舌帽).

23.What has three hands but only one face?

Clock.

24.What starts with T, ends with T, and can be full of T?

Teapot.

25.What eight-letter word has only one letter in it ?

Envelope.