Progress has been very good so farWe are confident that the work will be completed as e

问题补充：

Progress has been very good so far．We are，, confident that the work will be completed as expected．

A. however

B. therefore

C. besides

D. otherwise

答案：

A. however

(答案→)B. therefore

C. besides

D. otherwise

解析：A．however然而，B．therefore因此，C．besides此外，D．otherwise否则，句意：到现在为止一直进展得很好，我们很自信工作会象预期的那样被完成。所以选B。