Light ________ faster than sound.

A. travel

B. travels

C. is going to travel

D. will travel

Light travels________ than sound．

　　　 A．much fast　　　 B．far fast　　 C．much faster　　 D．more taster

The teacher said light ________ faster than sound．

1. A.
   went
2. B.
   goes
3. C.
   travels
4. D.
   runs

Our teacher said light               faster than sound．

A．traveled                                                  B．has traveled

C．is traveling                                                D．travels