◎ 题干
I don't know _______ he will come or not tomorrow. _______ he comes, I will tell you.

 [     ]

A. if, Whether
B. whether, Whether
C. if, If
D. whether, If
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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 don't know _______ he will come or not tomorrow. _______ he comes, I will tell you.[ ]A. if, Whether B. whether, Whether C. if, If D. whether, If …”主要考查了你对  【从属连词】  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。