Professor Li _______ in doing his experiment for nearly ten years.
举一反三
- As a chairman for nearly ten years, Professor Smith has never _______ anything dishonest.
- Yesterday Li Ming went to the village _________ his family lived ten years ago.
- We ___ each other for nearly ten years.
- Yesterday Li Ming went to the village_________ his family lived ten years ago. A: where B: which
- Professor Li _______ his success to his mother．