问题补充:
The teacher said that .
A. light travel much faster than sound
B. light travelled much faster than sound
C. light had travelled much faster than sound
D. light travels much faster than sound
答案:
A. light travel much faster than sound
B. light travelled much faster than sound
C. light had travelled much faster than sound
(答案→)D. light travels much faster than sound
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。