The third prediction from the experts at IBM is a better technology to prevent unwanted e－mail.As you eliminate mail，you don’t read it，you just look at it and kill it.After a while the device learns your habits and works for you as your assistant by eliminating stuff you never want.

　　1．How will people control electronic devices in the future according to the passage？(No more than 6 words)

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　　2．How many technology predictions does the passage deal with？(1 word)

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　　3．What are some of the most common biometrics used to identify people？(No more than 10 words)

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　　4．Why can the device work as your assistant according to the last paragraph？(No more than 15 words)

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