试题详情
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 |
知识点
参考答案
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