There were some different opinoins at the meeting but it was a great success .
A. in a word
B. in all
C. on the whole
D. or rather
网友回答
A. in a word
B. in all
(答案→)C. on the whole
D. or rather
解析：句意: 会议上有一些不同的意见,但是总体来说是很成功的。on the whole意思为 “大体上；总得来说”。in a word简言之;一言以蔽之; in all总共;总计; or rather更确切地说。根据语境，只有C项符合题意。