2______ one second, light travels about 300, 000 kilometers, but sound travels only 340 meters. You can get some idea of this difference by 3______ the start of a running match. If you stand far away from the starter(发令员), you can see smoke 4______ from his gun 5______ the sound reaches your ears. The fast speed of light produces some strange facts. The nearest star is 6______ far away that light which you can see from it tonight started to travel to you four years 7______ at a speed of nearly two million kilometers every minute. The light from some of tonight's started on 8______ journey towards you even before you were born. So, if we want to be honest(诚实), we 9______ say,“The stars are shining brightly tonight.”We have to say,“The stars look nice. They were 10______ four years ago but their light has just reached our earth.”

从括号中选择正确的词填空，使短文意思完整，必要时需改变词的形式。
(before, discover, fast, in, come, watch, so, fast, it, ago, shine, not can)
Light travels at a speed(速度)which is about a million times 1______ than that of sound. 2______ one second, light travels about 300, 000 kilometers, but sound travels only 340 meters. You can get some idea of this difference by 3______ the start of a running match. If you stand far away from the starter(发令员), you can see smoke 4______ from his gun 5______ the sound reaches your ears.
The fast speed of light produces some strange facts. The nearest star is 6______ far away that light which you can see from it tonight started to travel to you four years 7______ at a speed of nearly two million kilometers every minute. The light from some of tonight's started on 8______ journey towards you even before you were born.
So, if we want to be honest(诚实), we 9______ say,“The stars are shining brightly tonight.”We have to say,“The stars look nice. They were 10______ four years ago but their light has just reached our earth.”