单项选择题
A. lived at the tavern B. was going home after leaving the stranger at the tavern C. was going away on the train D. had to go back to the train station after leaving the stranger at the tavern.
A. to describe how pruning a tree is done B. to discuss different ways of pruning trees C. to give practical instructions for pruning a tree D. to explain how a tree wound gets diseased and heals
A. everything that was known B. law and something about medicine C. many new subjects D. the subjects that interested students