Translation
The reason why children learn their mother tongue so well lies partly in the child
himself,and partly in the behavior of the people around him.In the first place,the time of learning
the mother tongue is the most favorable of all,namely,the first years of life.A child hears it spoken
from morning till night and,what is more important,always in its genuine form,with the right
pronunciation,right intonation,right use of words and right structure.
出自:大学英语1

完成拼图验证

按住下方滑块,将拼图拖到缺口处后松开。

拼图背景,将小拼图拖到缺口处
向右拖动滑块