正确答案是C
问：你知道声音传播速度很快吗?
答：是的,但是光要比声音传的更快.
A.和...一样快 B.比...快一点 C.比...快很多 D.比...慢
而声音的传播速度是340m/s,而光的传播速度是C=299 792 458 米/秒（精确值）
可见,C选项是正确答案.
Do you know sound travels very fast?
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