d in ___.A. sound patterns B. vocabularies C. grammatical structures D. both A and B47. The author says that professional linguists recognize that ___.A. Western languages are superior to Eastern languagesB. All languages came from grunts and groansC. The hierarchy of languages is difficult to understandD. There is no hierarchy of languages48. The article states that grunt-and-groan forms of speech are found ___.A. nowhere today B. among the Australian aboriginesC. among Eastern cultures D. among people speaking “backward” languages49. According to the author, languages, whether civilized or not, have ___.A. the potential for expanding vocabularyB. their own sound patternsC. an ability to transfer ideasD. grammatical structures
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