Question

The teacher told us that light ________ faster than sound．

1. A.
   travelled
2. B.
   has travelled
3. C.
   travels
4. D.
   was travelling

Answer 1

C
直接引語如果是客觀事實或真理，變?yōu)殚g接引語時，不管主句用什么時態(tài)，間接引語的時態(tài)不變。