单项选择题

The last paragraph is mainly about______.

A．the cost of advertising a product
B．the effect of advertisement on people's lives
C．the benefits advertisement brings
D．various media for advertising products

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单项选择题

Person-to-person sale failed to meet the need______.

A．when the Industrial Revolution started
B．when goods began to be produced in great quantities
C．because trains replaced men in carrying goods around
D．as attention was shifted from distribution to production

单项选择题

Which of the following rifles best reflects the main focus of the passage

A．A Survey of Three Mexican American Families at Work in Texas.
B．Innovative Career Women: Effects on Family Unity.
C．Changes in the Lifestyles of Migrant Mexican-American Families.
D．Farming of Family: The Unavoidable Choice for Migrant Farm Workers.