题目内容
从所给的四个选项中选择最佳答案
_______ he has decided to do something, it's not easy to change his mind.
[ ]
A.As B.While C.Once D.Before
答案:C
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题目内容
从所给的四个选项中选择最佳答案
_______ he has decided to do something, it's not easy to change his mind.
[ ]
A.As B.While C.Once D.Before