问题补充:
The physics teacher said that light much faster than sound.
A. travels
B. traveled
C. to travel
D. was travelling
答案:
(答案→)A. travels
B. traveled
C. to travel
D. was travelling
解析:句意:物理老师说,光比声音传播得快得多。结合语境可知下文宾语从句中描述的是客观的动作,故用一般现在时态。主语light是抽象名词,不可数,故用单数第三人称。选A。