单项选择题
A. from mid-19th century to mid-20th century B. from 1920s to 1940s C. from the late 18th century to early 19th century D. from 1910s to 1930s
A．Longman Dictionary of Contemporary English. B．he Concise Oxford Dictionary. C．Everyman's English Pronouncing Dictionary. D．The Advanced Learner's Dictionary of Current English.