__________ children believe they can succeed, they will never become totally ...

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问题 __________ children believe they can succeed, they will never become totally independent.

选项 A.If
B.Though
C.Unless
D.When

答案C

解析根据句意,除非孩子们相信他们能够成功,否则他们永远都不会完全独立。Unless意为“除非,如果不”,符合句意,故可知选C。
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