单项选择题
A．are forms of biological development B．have actually developed from hunting C．are essentially forms of taming the prey D．have changed the ways of hunting
One thing he felt regret for was that he never had the ...
单项选择题One thing he felt regret for was that he never had the ______ of hearing him play the piano.
A．sword B．wrong C．answer D．weight
填空题
A．fear B．dear C．clear D．bear
