单项选择题The heir to the Britain Crown is also called______
单项选择题The period ranging from 1865 to 1914 has been referred to as ______in American literature.
单项选择题The United States bought Louisiana from______
单项选择题Speakers' Comer located in______, where speaker can deliver their eloquent speech.
单项选择题Which of the following is not a character of acquisition