单项选择题The passage suggests that the author would be likely to agree with which of the following statements about the social structure of eighteenth-century American society Ⅰ. It allowed greater economic opportunity than it did social mobility. Ⅱ. It permitted greater economic opportunity prior to 1750 than after 1750. Ⅲ. It did not contain rigidly defined socioeconomic divisions. Ⅳ. It prevented economic disputes from arising among members of the society.

单项选择题A．In the southern state of Tumailimo.B．In the mining town of Tumailimo.C．In the jungles southeast of Caracas.D．To kilometers southeast of Caracas.

单项选择题A．The initials BBC stand for British Broadcasting Corporation.B．It’s a public corporation.C．The government can’t control it.D．There are some advertising on it.

单项选择题A．Extravagant.B．Formal.C．Dull.D．Toned-down.

单项选择题Which of the following is the world's smallest continent