The teacher said that ____________________A.light travel much faster than soundB.light travelled much faster than soundC.light had travelled much faster than soundD.light travels much faster than sound
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D解析这题考查宾语从句的用法，当宾语从句的内容是客观真理时，即使主句是过去时，从句也是一般现在时，又因为主语是：light，谓语用travels。选D。