◎ 题干
I bet Mrs. Black will come to help us with the celebration if she ______ too busy tomorrow.
[     ]
A. is
B. will be
C. won't be
D. isn't
◎ 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 bet Mrs. Black will come to help us with the celebration if she ______ too busy tomorrow. [ ]A. is B. will be C. won't be D. isn't …”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。