单选题_____ his knowledge of&nb

问题补充：

单选题_____hisknowledgeofthemountainouscountry,JohnSmithwasappointedasourguide.A.In spite ofB.On account ofC.Regardless ofD.Instead of

答案：

B解析on account of(=because of)由于，因为。regardless of(=without worrying about)不顾；Regardless of danger, he climbed the tower.