单项选择题
He is the most intrepid explorer in the present century.（）
A. successful B. fearless C. reliable D. fearsome
单项选择题 She bustled about with an assumption of authority.（）
单项选择题 The guest turned upside down his glass as a signal that he would drink no more.（）
单项选择题 Motivation is the driving force within individuals that impels them to action.（）
