1.What is smaller than an insect's mouth?

1.What is smaller than an insect's mouth?
2.What season is the most dangerous one?
3.From what number can one take half and leave nothing?
4.How many feet are in a yard?
5.What person tries to make others smile most of the time?
 
1.If you can eat like a horse, you’ll put on some weight (译：
2.Tom wants to give his mother a happy surprise( 吃惊),but his younger brother let the cat out of the bag.译：
3.     In the dancing party the students let their hair down.译：
4.Don’t get a word in when others are talking.译：
5.Making kites is child’s play.All of us can do it.译：
 
1.I have only $10 and $20 bills in my pocket.There are three times as many $20 bills than $10 bills.I have a total of $490.How many $20 bills do I have?                      
2.There are red and blue balls in a box.At least 90% of the balls is red.Kate is taking the balls out of the box one by one.Only one of the first 50 balls was blue.While she was taking out the rest of them,every 8th ball was blue.How many balls could there be in the box the most?
3.The magic cape and the magic hat together costs $240.The price of the cape is 7/3 of the price of the hat.How much does each cost?               
 
Three girls' birth years are 1986,1989,and 1992.Their last names are Kiss,Hunter,and Goldbach.Their first names are Olga,Maria,and Renata.It happened one year that they realized that everybody is the same age as the number of letters in their own full names (first + last name).What year did this happen and what are their names?
 
1.  In which year Second War ended?
2.      What is the colour of “Black Box” in aeroplanes?
3.      What animals has two long teeth called tusks?

/>What is smaller than an insect's mouth?

Anything it eats.
2.What season is the most dangerous one?
Autumn.Because it is also FALL.
3.From what number can one take half and leave nothing?
EIGHT.（8）
4.How many feet are in a yard?
It depends on how many people stand in the yard.(码,院子)
5.What person tries to make others smile most of the time?
A photographer
1.If you can eat like a horse,you’ll put on some weight (译：
如果你能吃得多,你会发福
2.Tom wants to give his mother a happy surprise( 吃惊),but his younger brother let the cat out of the bag.译：
汤姆想要给妈妈一个惊喜,但是他的弟弟把秘密泄露出来了.
3.    In the dancing party the students let their hair down.译：
在舞会上    学生们 彻底放松
4.Don’t get a word in when others are talking.译：
别人谈话时不要插嘴.
5.Making kites is child’s play.All of us can do it.译：
制作风筝非常容易.我们都会做.
1.I have only $10 and $20 bills in my pocket.There are three times as many $20 bills than $10 bills.I have a total of $490.How many $20 bills do I have?       
       Y=3X,
10X+20Y=490
联立求解得,Y=21（张）
So I have 21 sheets $20 bills.       
2