单项选择题
A．Thinking is a social phenomenon. B．Thinking is solely a brain function. C．Thinking is a function of the nervous system. D．Thinking is the sum total of bodily activity
A．Ours B．Mine C．Our D．it
A．was the first reliable experiment in language study in history B．proved what it meant to prove C．was not necessarily sound though based on observation D．was utterly ridiculous and not worth mentioning