◎ 题干
I really don't know if she _______ happy when she ______.

A. is, arrives
B. is, will arrive
C. will be, will arrive
D. will be, arrives
◎ 答案
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◎ 解析
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◎ 知识点
    根据n多题专家分析,试题“I really don't know if she _______ happy when she ______. [ ]A. is, arrives B. is, will arrive C. will be, will arrive D. will be, arrives …”主要考查了你对  【状语从句】  等知识点的理解和应用能力。关于这些知识点的“档案”,你可以点击相应的链接进行查看和学习。