1. (2021九下·蓬安月考) 阅读所给材料，从每题所给的 A、B、C、D 四个选项中，选出最佳选项。

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

Things	Cutting board	Toothbrush	Chopsticks	Blanket
Main Material	Wood	Plastic	Wood	Wool
Cleaning way	Using hot water	Using warm water	Using hot water	Dry-cleaning
Replacing Reason	Producing bacteria （细菌）	Causing a toothache	Producing bacteria	Being worn out
Replacing Time	Every three years	Every three months	Every five months	Every five years
Cost	￥45.00 each	￥18.00 each	￥20.00 a pair	￥358.00 each

1. （1） From the chart aboveN, we know that        of the four things is/are made of wool.

   A . one B . two C . three
3. （2） You should replace your        every three months, or it may cause you to see a dentist.

   A . chopsticks B . cutting board C . toothbrush
5. （3） According to the chart, blankets may be used       .

   A . for dry cleaning B . for the longest time C . as long as chopsticks
7. （4） You should clean        with hot water.

   A . toothbrushes and cutting boards B . chopsticks and blankets C . chopsticks and cutting boards
9. （5） According to the chart, which of the four things cost most during the same time?      

   A . Chopsticks. B . Blankets. C . Toothbrushes.