单项选择题
A. is useful in clarifying economic utility B. was developed from human activities C. was initiated by some neuroscientists D. is hard for the public to understand
A. The streams of the Zambezi Riven. B. The fish species in the Zambezi River. C. The ways of fishing in the Zambezi River. D. The fishing harvest celebrations along the Zambezi River.
A. coach Sullivan’s team B. fight for West Point again C. contribute to his country D. be a sportsman forever