单项选择题

The improved quality of facial tissues resulted from （）

A．mass-production methods
B．popular demand for a better product
C．a decrease in price
D．competition among manufacturers

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单项选择题

When the demand for facial tissues increased, the supply （）

A．was not stopped
B．became more competitive
C．remained unchanged
D．was increased to keep up with the demand

单项选择题

In regard to the production of goods in greater quantities, the author states that （）

A．the price of the goods would drop
B．the price of the goods would rise
C．the quality and the price would rise
D．the quality would rise and the price would drop