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【题目】—Do you know sound travels very fast?
—Yes. But light travels _________ sound.
A.much faster than
B.a little faster than
C.as fast as
D.slower than

【答案】A
【解析】根据语境可知用比较级;much修饰比较级;句意:—你知道声音能传播很远吗?—是的,但是光的传播速度比声音快的多。结合句意,故选C

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