单项选择题A. To help him explain the information to his roommate. B. To help him write a paper. C. To prepare for a test. D. To tell her if the notes are accurate.
单项选择题A. Castles’ structure and the eating habit in them. B. Castles’ structure and the people who lived in them. C. Castles’ structure and the life in them. D. Why people built castles and their structure.