单项选择题
A．He used to work as a miner in Nevada. B．He works hard to support his five kids. C．He considers himself a blessed man. D．He once taught at a local high school
A．The shape of the cubes used. B．The size of the objects shown. C．The number of times of repeating the process. D．The weight of the boxes moving across the stage.
A．They are too heavy to carry B．They take up too much space. C．They cost too much money. D．They often go out of print.