—Do you know sound travels very fast?　一Yes. But light travels sound. Amuch faster than

—Do you know sound travels very fast?
　一Yes. But light travels sound.
Amuch faster than
B. a little faster than
C. as fast as
D. slower than

(答案→)A. much faster thanB. a little faster than C. as fast asD. slower than解析：句意：你知道声音传播很快吗？知道，但是光比声音传播要快得多。Much faster than, 快得多，much用来修饰faster,表程度；a little faster than,快一点点；as fast as和…….一样快；slower than比……要慢。很明显A符合题意。

对的，就是这个意思