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（） more attention, the tree could have grown better.
A、Given
B、To give
C、Giving
D、Having given
【正确答案】：A
【题目解析】：这是过去分词作状语，相当于一个虚拟条件句，句子是与过去相反的虚拟语气原句= if the tree had been given more attention, it could have grown better.假如给予更多的照料，这棵树就可能会长得更好。