单选题 (　　) part is the most densely populated region in America.

单选题 The world’s largest freshwater lake is Lake(　　).

单选题 The famous Yellowstone National Park is situated in northwestern part of(　　).

单选题 Among the five Great Lakes, only(　　) is wholly within the United States.

单选题 The Great Salt Lake lies in northern(　　).

单选题 The world-famous Niagara Falls lie between lakes of(　　).

单选题 (　　) has been called the “cradle of American Liberty”.

单选题 In eastern(　　) lies Death Valley, 85 metres below sea level.