Bell wanted to invent a modified telegraph, didn't he? разделительный
Who wanted to invent a modified telegraph.? вопрос к подлежащему
Did Bell want to invent a modified telegraph? общий вопрос
Did Bell want to invent a modified telegraph or a phone ? альтернативный
What did he want to invent? специальный
Bell heard the sound of a clock through the wire, didn't he?разделительный
Who heard the sound of a clock through the wire?вопрос к подлежащему
Did he hear the sound of a clock through the wire? общий вопрос
Did he hear the sound of a clock or a music through the wire?альтернативный
What did he hear through the wire? специальный
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