______ made the important distinction between linguistic competence and linguistic performance.

单项选择题Tess of the D'Urbervilles and Jude the Obscure are two representative novels written by ______.

单项选择题______ is a comedy of manners written by Oscar Wilde.

单项选择题Christopher Columbus discovered the North American continent in ______.

单项选择题The two leading parties of America are ______.

单项选择题The Portrait of a Lady was written by ______.