1. Did Bell want to invent a modified telegraph?
Что такое специальный вопрос?
Did Bell want to invent a modified telegraph, didn't he?
Did Bell want to invent a modified telegraph or television?
Who wanted to invent a modified telegraph?
2. Did Bell hear the sound of a clock through the wire?
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Did Bell hear the sound of a clock though the wire, didn't he?
Did Bell hear the sound of a clock through the wire of the window?
Who heard the sound of a clock through the wire?