They would have accomplished the project,but they __abroad for a conference.A.had gone B.went

问题描述:

They would have accomplished the project,but they __abroad for a conference.A.had gone B.went
如果改成IF引导的条件句 应该怎么改

应该选择B .这题的意思是他们应该已经完成这个项目了.如果他们没有去国外开会的话.had gone是过去完成时没错,但是这个地方应该用过去时.
如果改成if的话就有问题了啊,翻译不通哎.