It is known to all that light travels in straight lines. 怎么改

It is known to all that light travels in straight lines. 英语：That light travels in straight lines is known to all. it is known to us all that light.=lt is___ ____that light... As is known to us all,light travels much faster than sound. What is known to us that the light travels faster than sound 写答案并说为何It is known to all that light traves faster than ____ ——is known to us all that sound travels more slowly than lig _____is known to all is that the earth travels around the su it ＿to all that light travels faster than sound A As is known to all that paper is made in China.改病句 It's known to all that___light travels faster than__sound. it is known to all that 和as is known to all that 区别