问题
选择题
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
答案：D
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。