Suppose you're at work and about to make an incredible breakthrough, but a colleague suddenly turns up.At this precise moment, the slightest disturbance would break your concentration. __38__ Once again, those wires hanging from your ears would be sure to give that “Go away！” signal.

　　__39__ It's probably part of the growing up stage when they just want to ignore their whole family.While their mothers give them lectures about why they should do their homework, they can just turn up the volume(声音) on their MP3 player, smile, and say “Yes, Mum.” Problem solved.

　　Pretty soon, not only will we have pretty colored wires hanging from our ears—but also our brains will be directly plugged into some new high­tech instrument.We'll be in a virtual(虚拟) world, communicating with everyone else, or choosing not to, as we like.In this world, we will all be permanently plugged in. __40__ And they are changing our social habits along the way.

　　In the end, there is a thin line between using technology as a tool for making life better and being a slave to it! It's so strange—suddenly, I don't feel like wearing my earphones any more!

　　A．Listening to music through earphones is the perfect way to ignore such interruptions.

　　B．I also have wires hanging from my ears.

　　C．They walk around in their own spaces, with their personal “digital noise reduction systems.”

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