_____ you have confidence, you will be successful in everything you are interested in.

A. Unless
B. Once
C. Whether
D. Before
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科目：高中英語 來源：期末題 題型：單選題

_____ you have confidence, you will be successful in everything you are interested in.
[     ]
A. Unless
B. Once
C. Whether
D. Before

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科目：高中英語 來源： 題型：

______ you have confidence, you will be successful in everything you are interested in.

　 A. Unless　　 B. Once　　　 C. Whether　 D. Before

 

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