单项选择题In his novel Robinson Crusoe, Defoe portrayed successfully an image of an enterprising Englishman, typical of the English bourgeoisie in the ______ century.
单项选择题Which is implied in the passage
单项选择题The year 2000 problem is caused by ______.
单项选择题What’s the main purpose of the passage
单项选择题When was China's official war against the millennium bug started