单项选择题
It can be inferred that most of the pioneers referred to in the passage were originally from where in the United States （）
A．The desert. B．The West. C．The State of Mississippi. D．The East.
单项选择题 We may infer from the passage that （）
单项选择题 As used in line 8, the word "cousins" refers to（）
单项选择题 The passage is mainly about （）
