A warm thought suddenly Acame to me Bwhich I might Cuse the pocket money to buy some flowe

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A warm thought suddenly Acame to me Bwhich I might Cuse the pocket money to buy some flowers Dfor my mothers birthday.

请帮忙给出正确答案和分析,谢谢!

热搜:a是b的充分条件,b是a的必要条件吗