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老師，向您請教兩道題
1. Why does she always ask you for help ?
There is no one else __________, isn't there?
A. who to turn to       B. she can turn to
C. for whom to turn     D. for her to turn　　

2. Do you know Tom quarreled with his brother last night?
I don't know.__________.
A. Nor I care            B. Nor do I care  
C. I don't care, too.    D. Neither don't I care.　　

老師，您能幫我總結一下這兩種題目嗎?或者推薦幾篇文章。