B How does it happen that children learn their mother tongue SO well?When we compare them With adults learning a foreign language，we often find this interesting fact．A little child without knowledge or experience often succeeds in a complete mastery of the language．A grown—up person with fully developed mental powers，in most cases，may end up with a faulty and inexact corflllland．What accounts for tllis difference? Despite other explanations。tlle real answer in my opinion hes partly in the child himself，partly in the  behaviour of the people around him．In the first place，the time of learning the mother tongue  in the most favorable of all，namely，the first years of hfe．A child hears it spoken from morning till night and，what is more important，always in its genuine form，with the right pronunciation，rightIntonation，right use of words and right structure．He drinks in all the words and expressions which come  to him in a hsh．ever—bubbhng spring．There is no resistance：there is perfect assimilation． Then the child has，as it were，private lessons all the year round，while an adult language— student has each week a limited number of hours which he generally shares with others．The child has another advantage：he hears the language in all possible situations，always accompanied by the right kind of gestures and facial expressions．Here there is nothing unnatural，such as is often found In  language lessons in schools，when one talks about ice and snow in June or scorching heat in January  And what a child hears is generally what immediately interests him．Again and again，when his attempts at speech a聪successful，his desires are understood and fulfilled． Finally，though a child’S“teachers”may not have been trained in language teaching，their re- lations with him are always close and personal．ney take great pains to Inske their lessons easy． 60．’rhe main idea of the passage is——． A．to tell why the native language is learnt SO well by children B．to teach children to learn their lllothei'language we C．to show that children’S teacher should take great p8ins to make their lessons easy D．to do research into the difference between children and adults 61．What does the underlined phrase“dlq．nks in”in paragraph 2 mean? A．drinks alcohol    B．has a drink of    C．takes in D．tastes 62．An adult has more difflculties in learning foreign languages well for the reason that_____． A．children are more indiligent than adults B．adults pay less attention to learning／anguages than children． C．children have private lessons all the year around D．an adult language—student has limited time to share with others 63．Ⅵmo ale the teachers teaching a child to learn his mother language? A。His parents．    B．His teachers．    C．People around him．D．Himself．