In the last ten years, they three great scientific experiments.
A. finished
B. have finished
C. had finished
D. have been finished
In the last ten years, they three great scientific experiments. A. finishedB. have finish
答案:2 悬赏:60 手机版
解决时间 2021-12-25 18:54
- 提问者网友：送舟行
- 2021-12-25 11:50
最佳答案
- 五星知识达人网友：山君与见山
- 2021-12-25 12:08
A. finished(答案→)B. have finishedC. had finishedD. have been finished解析：句意：在过去的十年，他们已经完成了三项伟大的科学实验。表示自过去某一时刻到说话时这段时间的经历，用现在完成时，选B。
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- 1楼网友：鸽屿
- 2021-12-25 12:41
谢谢了
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