填空题 Clear [1] and dark[]are allophones of the same one phoneme /1/.They never take the same position in sound combinations， thus they are said to be in c（） distribution.

填空题 In the course of time， the study of language has come to establish close links with other branches of s（） studies， such as sociology and psychology.

单项选择题 Which of the following best states the behaviorist view of child language acquisition （）.