Mr. Green is said an experiment to prove the new method of solving the problem when young.
A. to do
B. to have done
C. to be doing
D. to have been doing
Mr. Green is said an experiment to prove the new method of solving the problem when young
答案:2 悬赏:20 手机版
解决时间 2021-01-04 16:25
- 提问者网友：伴风望海
- 2021-01-03 18:56
最佳答案
- 五星知识达人网友：夜余生
- 2021-01-22 07:37
A. to do(答案→)B. to have doneC. to be doingD. to have been doing解析：由when young可知此处应该用不定式的完成式，表示此动作发生在谓语动作之前。
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- 1楼网友：未来江山和你
- 2021-01-22 08:58
我好好复习下
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