DO YOU KNOW WHO ___________ THE FACT THAT SOUND TRAVELS IN WAVES
Câu 11:
Do you know who ___________ the fact that sound travels in waves?
A.
invented
B.
discovered
C.
developed
D.
found
Câu 11:
Do you know who ___________ the fact that sound travels in waves?
A.
invented
B.
discovered
C.
developed
D.
found