Progress so far has been very good．We are, , confident that the work will be pleted as expected．
A. however
B. therefore
C. beside
D. otherwise
网友回答
A. however
(答案→)B. therefore
C. beside
D. otherwise
解析：考查副词。句义：到现在为止已经有了很好的进展，因此我们自信这项工作将如期完成。A．however 然而B．therefore 因此C．beside 在…旁边D．otherwise否则，根据前句Progress so far has been very good到现在为止已经有了很好的进展，和后边the work will be pleted as expected．我们自信这项工作将如期完成，是因果关系，所以B正确。