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275. A telephone is an instrument by which we can speak to people far away. The underlined word means ____.

275. A telephone is an instrument by which we can speak to people far away. The underlined word means ____.

A. a tool                       B. an experiment          C. an expression           D. an instruction

A telephone is an instrument by which we can speak to people far away. The underlined word means ____.

A. a tool　 B. an experiment　 C. an expression　 D. an instruction