There were some different opinoins at the meeting but it was a great success.A. in a wordB

问题补充：

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

答案：

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。