单项选择题In some speech community, two languages are used side by side with each having a different role to play, this is ______.
单项选择题Which of the following statements would the writer probably Not support
单项选择题In Jefferson’ s opinion, what could prevent tyranny and preserve freedom
单项选择题Etiquette as an art of gracious living is quoted as a feature of which country
单项选择题Why did Annan meet the seven top pharmaceutical companies