Since tablets and smartphones have（ ）interface,many people believe that all home and business computers will eventually have this kind of interface too.

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Since tablets and smartphones have（ ）interface,many people believe that all home and business computers will eventually have this kind of interface too.

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For thousands of years people communicated ___ little more than words, stone tablets, and smoke signals.

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Today it is common to access the Internet from a variety of ( ) devices like smartphones and tablets.

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His sister left home in 1998，and（）since．

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