- 试题详情及答案解析
- Only when____ 30 years old _____ to learn English.
| A．was he; did he began | B．he was; did he begin |
| C．was he; he began | D．he was; he begin |
- 答案：B
- 试题分析：考查部分倒装。句意：他到了30岁才开始学习英语。only+状语或状语从句放句首时，主句使用部分倒装，only后的从句不倒装，根据第一空排除A、C；第二空应该用部分倒装，即把do/be/have/can/will等提到主语前面，D项未倒装，排除D，故选B。
考点：考查部分倒装