◎ 题干
-I don’t know        
-Because he has to look after his mother.
A.Why he is leavingB.why is he leaving
C.whether he will leaveD.what is he leaving for
◎ 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 don’t know -Because he has to look after his mother.A.Why he is leavingB.why is he leaving C.whether he will leaveD.what is he leaving for…”主要考查了你对  【宾语从句】【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。