阅读理解。

    The world in 2020 will be very different from now. We’ll live a much better life.

    In 2020, schools will be different. At that time, robots will be teachers and they will explain questions

if students don’t know the answers. People are also going to change. For example, now we have to do

housework but in 2020 robots are going to do everything for us. They are going to clean the house and

cook. They are going to do everything that you need to do in your house.

    In 2020, we will make many new machines and they can do a lot of things and save a lot of time for

people. New medicine will come out so people will become healthier.

1. What does the word “explain” mean in Chinese?

A. 解释            

B. 抱怨          

C. 责备          

D. 处罚

2. Who will help with your housework in 2020 according to the passage?

A. Cleaners.        

B. Parents          

C. Robots        

D. Friends.

3. Which of the following is NOT mention (提及) in this passage?

A. New medicine    

B. New food        

C, New machine    

D. New robots

4. How will people be in 2020?

A. Thinner          

B. Busier          

C. Sadder          

D. Healthier

下列涂装方法对环境危害最大的是（）。

A、电泳涂装

B、高压无气涂装

C、粉末涂装

D、空气喷涂