Question

The teacher said to us that light ________ much faster than sound．

1. A.
   will travel
2. B.
   traveled
3. C.
   travels
4. D.
   was traveling

Answer 1

C
光传播速度比声快是个不变的真理，像这样的情况变间接引语时时态不变，总是用一般现在时。