According to the speaker, how many people have been added per year to -考呗网题库移动版
英语六级
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A.80 million.
B.70 million.
C.More than 3,500 million.
D.About 3,000 million.

参考答案B
解析:B

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A.Latin America.
B.North America.
C.South America.
D.Central America.

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.

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