23（）

单项选择题Consumers are concerned about the changes in the package size, mainly because ______.

A. they hate to see any changes in things they are familiar with
B. the unit price for a product often rises as a result
C. they have to pay for the cost of changing package sizes

单项选择题Chinese characters need （）.

A．three and four-key combinations
B．English keyboards
C．different computers
D．Western-style keyboards