her hard work, she succeeded in passing the exam.
A. On account
B. Owing to
C. As a result
D. Because
网友回答
A. On account
(答案→)B. Owing to
C. As a result
D. Because
解析：考查短语辨析。On account of“因为，由于”；Owing to“由于，归于......”；As a result“结果”；because“因为”，后跟句子。句意“由于她的努力工作，她成功通过了考试。”故选B。