The research is so designed that once nothing can be done to change it.
A. begins
B. having begun
C. beginning
D. begun
The research is so designed that once nothing can be done to change it.A. beginsB. having
答案:2 悬赏:10 手机版
解决时间 2021-04-05 22:17
- 提问者网友：动次大次蹦擦擦
- 2021-04-05 07:12
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- 五星知识达人网友：鸽屿
- 2021-04-05 07:46
A. beginsB. having begunC. beginning(答案→)D. begun解析：答案选D，可视为once it is begun之省略。【标签】省略
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- 1楼网友：逃夭
- 2021-04-05 08:11
和我的回答一样，看来我也对了
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