Replacing some things in your house at the right time can make you healthier．Some researches show us when and why the following things should be replaced．

Item	Toothbrush	Cutting board	Chopsticks	Blanket
Main Material	Plastic	Wood	Wood	Wool
Cleaning Way	Using warm water	Using hot water	Using hot water	Dry﹣cleaning
Replacing Reason	Causing a toothache	Producing bacteria	Producing bacteria	Being worn out
Replacing Time	Every three months	Every three years	Every five months	Every five years

Word Box：wool 羊毛 dry﹣clean 干洗 bacteria 细菌

根据表格所提供的信息选择最佳答案．

36．According to the form above， 　　of the four items is （are） mainly made of wood．

A．	one
B．	two
C．	three

37．Your 　　needs replacing every three months because it may cause you to have a toothache．

A．	toothbrush
B．	cutting board
C．	blanket

38．According to the form above，blankets should be used 　　．

A．	for the shortest time of the four
B．	for the longest time of the four
C．	as long as chopsticks

39．You should clean 　　with hot water

A．	chopsticks and blankets
B．	cutting boards and chopsticks
C．	toothbrushes and cutting boards

40．Which of the following is TRUE according to the form above？ 　　

A．	Your cutting board should be dry﹣cleand with hot water．
B．	Warm water prevents your chopsticks from producing bacteria．
C．	Being worn out is the reason for replacing your blanket．