Question

【题目】________ you try your best，you'll have the chance to succeed.

A.UnlessB.OnceC.UntilD.Though

Answer 1

【答案】B

【解析】

句意：一旦你尽了最大的努力，你就有成功的机会。

unless除非；once一旦，曾经；until直到；though虽然。根据下文you'll have the chance to succeed.可知上文是一旦你尽你最大努力；根据题意，故选B。