Progress so far has been very good, _____, we are sure that the

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
【正确答案】：C
【题目解析】：本题考查连词辨析。句意：迄今为止，进展一直很顺利。因此，我们肯定这个项目能按时完成。前后两句话是因果关系，故用therefore。however不管怎样，然而；otherwise另外，否则；therefore因此，所以；besides此外，除此之外。