In the last ten years, they _______ three great scientific experiments.
A.finishedB.havefinishedC.hadfinishedD.havebeenfinished...
A. finished
B. have finished
C. had finished
D. have been finished 展开
B. have finished
C. had finished
D. have been finished 展开
1个回答
推荐律师服务：
若未解决您的问题，请您详细描述您的问题，通过百度律临进行免费专业咨询
