听力原文：

What will the life be like in the future? 

In the future, we won’t have to change many clothes. We will wear a kind of special clothes. We can be warm when it’s cold and be cool when it’s hot. They will have many beautiful colors. We will be able to change the colors anytime we like. 

In the future, there will be more and more kinds of food we can choose. They will be much more delicious than now. They will not be expensive. We will be able to buy them with little money. 

In the future, all of us will live in beautiful houses. They will be able to move anywhere. When we want to change the place we live, it will be quick and without any trouble. 

In the future, we won’t have to go to work by bus or bike. Everyone will have a small but useful plane; we will go anywhere we want by plane. In the future, each family will have a robot. Our mothers won’t be busy with housework, and they won’t be tired. When we feel sick, we won’t have to go to hospital to see a doctor. The teachers won’t need to go to school to work because they can teach students through the Internet.

Question: Why won’t our mothers be busy with housework in the future?

参考答案: 

Because each family will have a robot.