填空题
How does it happen that children learn their mother tongue
so well When we compare with adults learning a foreign 1.（）
language, we often find this interesting fact. A little child
without knowledge or experience often succeeds to a complete 2.（）
master of the language. A grown-up person with fully developed 3.（）
mental powers, in most cases, may end up in a faulty and inex- 4.（）
act command. What accounts of this difference 5.（）
Despite other explanations, the real answer in my opinion
lies partly with the child himself, partly in the behavior of the 6.（）
people surround him. In the first place, the time of learning the 7.（）
mother tongue is the most favorably of all, namely, the first 8.（）
years of life. A child hears it speak from morning till night and, 9.（）
what is more important, always in its genuine form, with the
right pronunciation, right intonation, right use of words and right
structure. He drinks all the words and expressions which come to 10.（）
him in a fresh, ever-bubbling spring. There is no resistance:
there is perfect assimilation.