A.80 million.
B.70 million.
C.More than 3,500 million.
D.About 3,000 million.
A.Latin America.
B.North America.
C.South America.
D.Central America.
A.An American.
B.The French men.
C.An English man.
D.A Chinese man.
A.Because it was difficult to get the pictures and sound together.
B.Because the audiences liked the silent form.
C.Because the inventors and producers liked the silent form.
D.Because the inventors and producers had no money to marry the image withsound.