[单项选择] Language learning begins with listening. Individual children vary greatly in the amount of listening they do before they start speaking, and late starters are often long listeners. Most children will "obey" spoken instructions some time before they can speak, though the word "obey" is hardly accurate as a description of the eager and delighted cooperation usually shown by the child. Before they can speak, many children will also ask questions by gestures and by making questioning noises. Any attempt to trace the development from the noises babies make to their first spoken words leads to considerable difficulties. It is agreed that they enjoy making noises, and that during the first few months one or two noises sort themselves out as particularly indicative(标示的)of delight, distress, sociability, and so on. But since these cannot be said to show the baby’’s intention to communicate, they can hardly be regarded as early forms of language. It is agreed, too, that from about three m
A. may have problems with their hearing
B. usually pay close attention to what they hear
C. often take a long time in learning, to listen properly
D. probably do not hear enough language spoken around them