____ more attention ,the trees could have grown better .

问题描述:

____ more attention ,the trees could have grown better .
A .Given B .To
give C .Giving D .
Having given

答案选A . Given
翻译:如果给予更多关注的话,那些树可能会长得更好.
这里是虚拟语气
整个句子补充完整应该是:
If the trees had been given more attention ,they could have grown better.