单项选择题

According to the context, "the turn-of-the-century" in Paragraph 3 refers to ______.

A．19th century
B．20th century
C．around 20th century
D．21st century
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单项选择题
The author is critical mainly of ______.
A．dishonest packaging
B．inferior packaging
C．the changes in package size
D．exaggerated illustrations on packages
单项选择题
According to this passage, various types of packaging come into existence to ______.
A．meet the needs of consumers
B．suit all kinds of products
C．enhance the market position of products
D．introduce new products
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