- 试题详情及答案解析
- Not until he left his home to know how important the family was for him.
| A．did he begin | B．had he begun |
| C．he began | D．he has begun |
- 答案：A
- 试题分析：考查倒装句。本题的解题关键是not until引导的时间状语从句放在句首，主句应采用倒装结构，left动作发生在前，begin to know动作发生在后，只能用一般过去时。故A正确。
考点：考查倒装句。