16. Compared with adults learning a foreign language, children learn their native language with ease.
A. Right
B. Wrong
C. Not mentioned
17. Adults' knowledge and mental powers hinder their complete mastery of a foreign language.
A. Right
B. Wrong
C. Not mentioned
18. The reason why children learn their mother tongue so well lies solely in their environment of learning.
A. Right
B. Wrong
C. Not mentioned
19. Plenty of practice in listening during the first years of life partly ensures children's success of learning their mother tongue.
A. Right
B. Wrong
C. Not mentioned
20. A child learning his native language has the advantage of having private lessons all the year round.
A. Right
B. Wrong
C. Not mentioned
21. Gestures and facial expressions may assist a child in mastering his native language.
A. Right
B. Wrong
C. Not mentioned
22. So far as language teaching is concerned, the teacher's close personal relationship with the student is more important than the professional language teaching training he has received.
A. Right
B．Wrong
C. Not mentioned