问题
选择题
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
答案
答案：C
本题考查副词的用法。however不管怎样；otherwise否则；therefore所以；besides除此以外。根据句意判断，前后两句为因果关系，故C项正确。