more attention, the cabbages grown better.
A. Given; could have
B. Giving; could be
C. Given; could be
D. Giving; could have
网友回答
(答案→)A. Given; could have
B. Giving; could be
C. Given; could be
D. Giving; could have
解析：考查过去分词做状语，the cabbages和give是被动关系，用过去分词做状语，Given more attention=if the cabbages had been given more attention，所以主句用虚拟语气，选A。