【題目】—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】根據(jù)語境可知用比較級；much修飾比較級；句意：—你知道聲音能傳播很遠嗎？—是的，但是光的傳播速度比聲音快的多。結(jié)合句意，故選C

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