1. (2019八下·嘉兴期末) 阅读下列短文，从每题所给的A、B、C和D四个选项中，选出最佳选项。

    Replacing (更换) 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	Wood
Cleaning way	Using warm water	Using hot water	Using hot water	Dry-cleaning
Replacing reason	Causing a toothache	Producing bacteria (细菌)	Producing bacteria	Being worn out
Replacing time	Every three months	Every three years	Every five months	Every five years

1. （1） According to the form above, ________of the four items is/are mainly made of wood.

   A . one B . two C . three D . four
3. （2） You should clean ________ with hot water.

   A . toothbrushes and cutting boards B . chopsticks and blankets C . cutting boards and chopsticks D . toothbrushes and blankets
5. （3） Which of the following is TRUE according to the form above?

   A . Your cutting board should be dry-cleaned with hot water. B . Warm water prevents your chopsticks from producing bacteria. C . Being worn out is the reason for replacing your blanket. D . Every three years is the best time to replace everything.