【单选题】( 3 ) Lan guages have been coming and going for thousands of years , but in recent times there has been less coming and a lot more going. When the world was still populated by hunter - gatherers , sma...
【单选题】Languages have been coming and going for thousands of years, but in recent times there has been less coming and a lot more going. When the world was still populated by hunter-gatherers, small, tightly...