A. a speech community B. its diversity C. human mind D.……

单项选择题Which of the following can be inferred about the old man seated behind the table().

A. He showed much tolerance to the old man.
B. He often put on airs before people of lower status.
C. He refused to respond to the old man’s enquiries.
D. He seemed to lose his patience too easily.

单项选择题The author refers to the somewhat lower urinary kallikrein levels in black children in order to ().

A. support the thesis that kallikrein levels are inversely related to blood pressure
B. highlight the special health problems involved in treating populations with high concentrations of black children
C. offer a causal explanation for the difference in urinary kallikrein levels between black and white children
D. suggest that further study needs to be done on the problem of high blood pressure among black adults

单项选择题Which of the following does NOT contribute to the convergent trend of American English and British English().

A. More international travel between the two countries.
B. The emergence of Hollywood as a film making center.
C. The advent of television.
D. The individual evolution of the two languages.

单项选择题The writer thinks that().

A. communicative competence is more important than linguistic competence
B. for the learner to acquire competence is more important than to acquire capacity systems
C. presenting the learners with problems is more important than providing them with solutions
D. knowledge of communicative schemata is more important than linguistic knowledge

单项选择题The people Nancy meets are().

A. hard to please
B. bad-mannered to women drivers
C. talkative and generous with tips
D. different in personality