2012年上海中考英语新题型专项练习选词填空3before, discover , fast, in, come, watch , so, fast it, ago , shine, not canLight 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 tonights 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. 参考答案：1.faster2.In3.watching4.come5.before6.so7.ago8.its9.cannot10.shining1用心 爱心 专心