问题描述：
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1 Do you know when the telephone----?
A was invented B invented C has invented D were invented
2 kites___messages in the war in the past.
A are used for sending B were used to sending C are used send D were used to send
1 Do you know when the telephone----?
A was invented B invented C has invented D were invented
2 kites___messages in the war in the past.
A are used for sending B were used to sending C are used send D were used to send
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