The teacher said that light faster than sound.A. travelB. to travelC. traveledD. travels

问题补充：

The teacher said that light faster than sound.

A. travel

B. to travel

C. traveled

D. travels

答案：

A. travel

B. to travel

C. traveled

(答案→)D. travels

解析：光的速度传播比声快，表示客观真理通常用一般现在时，light为单数第三人称，故选D。