You have made a few mistakes in your position but you have done well.
A. as a whole
B. on the whole
C. on the other hand
D. generally speaking
网友回答
A. as a whole
(答案→)B. on the whole
C. on the other hand
D. generally speaking
解析：on the other hand或generally speaking与题意不符，因而排除C、D两项；as a whole意为“作为一个整体，总体上”。例如：We must consider these matters as a whole.（我们必须全盘来考虑这些事）；on the whole意为“大体上；基本上；总的来说”，例如：On the whole,I’m in favour of the idea.（大体来说，我赞成这个想法）。因而，正确答案为B。