单项选择题The National Day of the United States falls on________.
单项选择题The exponent of the concept communicative competence is________.
单项选择题The head of the ruling party and that of the Opposition party in Britain are called________. respectively.
单项选择题________, who were French-speaking, achieved the final unification of England.
单项选择题The Immediate Constituent Analysis is an approach typical of________.