Do you know about the “happy switch”? Doctors can use this to help very sad people feel better quickly! The “happy switch” is a kind of Brain-Computer Interface (BCI, 脑机接口). It connects brains to computers like a bridge. Some BCIs can affect brain activities, while others let people control computers with their thoughts. BCI might help us in many new ways soon.

BCI technology is still growing. Maybe one day, it will help everyone live happier and easier lives! What would you do with a brain-computer connection?

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1.1. What can the “happy switch” do?

A Make people cry with joy.

B Help sad people feel better.

C Connect people’s hands to computers.

D Make it easier to work on computers.

解析：选B。细节理解题。根据文章开头提到的“Doctors can use this to help very sad people feel better quickly!”可知，“快乐开关”能帮助情绪低落的人振作起来，感觉更好。故选B。

2.2. BCI can help people ________.

A use hands to control characters

B play games without screens

C make characters move by thinking

D create new game rules

解析：选C。细节理解题。根据第二段的“With BCI, you can play games without hands! Just think ‘jump,’ and your game character jumps!”表明利用BCI玩游戏时，玩家能够凭借意念操控游戏人物的动作。故选 C。

3.3. How might two people use BCI to “talk”?

A By writing messages on paper.

B By sharing brain signals.

C By using special hand signs.

D By singing songs together.

解析：选B。推理判断题。根据第四段的“Two people connected to a computer can ‘talk’ without speaking or typing—just using thoughts!”可知，两个人可以使用思想进行交流，而不用互相说话，由此推断他们可通过计算机共享脑电波信号。故选B。

4.4. If someone cannot draw, BCI can ________.

A turn their thoughts into pictures

B teach them painting skills

C control their hands to draw

D buy art tools for them

解析：选A。细节理解题。根据第五段的“BCI can turn your ideas into art! ”可知，BCI可以将想法转化为艺术，实现从思想到图像的转化。故选A。

5.5. What does the underlined word “it” refer to?

A The game.

B The computer.

C The smart home.

D BCI technology.

解析：选D。词意指代题。根据划线单词前面的“BCI technology is still growing.”可知，BCI技术仍在发展，作者相信“也许有一天，它会帮助每个人过上更快乐、更轻松的生活”。由此可知，it指代的便是BCI技术。故选 D。