C. Police footage could be changed on purpose. D. Footage should not be filmed by police.

3. What does the author believe?

A. People behave well with cameras on.

B. People's private lives should be respected.

C. Talking about others' private lives promotes social interactions.

D. People keep silent before cameras when talking about themselves.

4. What is suggested in the last paragraph?

A. We don't need a critical threshold. B. We should be cautious in adopting body-cam.

C. We need body-cam as an insurance policy. D. We haven't decided whether to take action.

【答案】1. A 2. C 3. C 4. B

【解析】

【分析】

这是一篇说明文。介绍了摄像技术给人们带来有利因素的同时也带来了很多的不利因素。

【1题详解】

词义猜测题。由第二段If people know they are on camera, especially when at work or using public services, they are surely less likely to misbehave. Another upside is that it would be harder to get away with crimes or to escape from blame for accidents 可知，如果人们知道自己在被监视，特别是在工作或使用公共服务时，他们肯定不太可能有不当行为。要逃脱犯罪或逃避事故的责任将更加困难。故划线词的意思是"优势"，选A。

【2题详解】

推理判断题。由第三段Alternatively, footage could be faked or doctored(伪造) to avoid blame or do wrong to others.可知，影像可以被人为地伪造或篡改，以避免指责或伤害其他人。故C选项正确。

【3题详解】

细节理解题。由第五段they oil the wheels of our social interactions可知，谈论别人的私生活会促进社会交往。故C选项正确。

【4题详解】

推理判断题。由最后一段We are nowhere near that point yet- but we should think hard about whether we really want to say lights, body cam, action可知，我们在使用随身摄相机时要谨慎。故B项正确。