单项选择题
A. England’s proximity to the North Sea B. Volcanic ash in the atmosphere C. Floorings in the area D. Pollution caused by the International Revolution
A. Invention of a written version of their language B. Disruption of oral transmission of tribal knowledge C. Introduction of old Slavonic for worship D. Institution of compulsory English education
A. A gift presented by shop. B. A gift from his wife. C. Bought it by himself. D. We don’t know.