In America, high school graduates have to take ______ in order to enter prestigious universities.

单项选择题Canada comprises ______ provinces and three territories.

单项选择题The study of how we do things with words is the study of ______.

单项选择题Charlotte Bronte's masterpiece is ______.

单项选择题In communication one may shift from formal English to informal English or from standard English to non-standard English. This is known as ______.

单项选择题The author of Sister Carrie is ______.