A. turn back to B. turn down C. turn on D. turn in 参考答案:D 答案解析:此题考查由动词turn构成的短语。D项turn in为非正式用语，意为“去睡觉”，符合题意。A项turn back to意为“原路返回”。B项 turn down意为“拒绝；把音量关小”。C项turn
第6题: [单项选择]What’s the purpose of the talk A. To interest students in a career in counseling. B. To recruit counselors to work in the placement office. C. To inform students of a university program. D. To convince local merchants to hire college students. 参考答案:C 答案解析:[听力原文]17-20
As a result of rising university costs, many students are finding it necessary to ta
