题文
Only when David did it a second time _________.
| A．he realized his mistake |
| B．he was realizing his mistake |
| C．did he realize his mistake |
| D．he did realize his mistake |
推荐试卷
Only when David did it a second time _________.
| A．he realized his mistake |
| B．he was realizing his mistake |
| C．did he realize his mistake |
| D．he did realize his mistake |
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