At the moment, Steven's invention looks more like a large ski mask than a pair of glasses.

　　It's a headset connected to a hand­held computer and a Global Positioning System (GPS) receiver, which tracks the wearer's position. But he says that these head­worn displays will eventually get smaller and lighter as technology improves.

　　And, of course, this new technology has a fashionable as well as a useful application. A chemical engineer named Robert Langer has invented a new microchip that, if put inside a ring, can give off different smells according to a person's mood. That, of course, may or may not appeal to you. And, in the end, it is shoppers, not scientists, who will determine which of these smart accessories will succeed as fashionable items and which are sure to join history's long list of crazy inventions.

　　It is clear, however, that as computers get smaller and cheaper, they will pop up in all sorts of easily­wearable accessories, even in the buttons on your coat. What's more, this is something that's going to happen a lot sooner than we all expect.

　　1. When Rosalind wore the headband, she was surprised at ______.

　　A. how well the sensor worked

　　B. how she was affected by traffic

　　C. how strong the signal was

　　D. how comfortable it was

　　2. For people eating out, Steven's glasses can ______.

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