【题目】Progress so far has been very good._________ , we are sure that the project will be
completed on time.
A. however B. Otherwise C. Therefore D. Besides
在线课程【答案】C
【解析】
试题分析：考查副词辨析：A . However然而B . Otherwise否则C. Therefore因此，D. Besides此外，句意：进展一直很好，所以我们一定能准时完成这个工程。根据语境可知选C项。