As we all know ,light————（travel）fastr than sound.

As we all know ,light————（travel）fastr than sound. As we all know,light (travel)faster than sound As we all know,light_(travel)faster than sound. 翻译We know that light travel much faster than sound. ——Do you know sound travels very fast?——Yes.But light travel Light travel faster than sound.=Sound ___ travel so ___ as l we know _______doesn,t travel so fast as light. As is known to us all,light travels much faster than sound. Nobody knew that light （）（travel）much faster than sound at t The teacher told us light ___ fast than sound.(travel) The light __(travel)faster than the sound. as we all know .