问题补充：
Only when .
A. did he arrive the meeting began
B. he arrived the meeting began.
C. did he arrive did the meeting begin.
D. he arrived did the meeting begin.
答案：
A. did he arrive the meeting began
B. he arrived the meeting began.
C. did he arrive did the meeting begin.
(答案→)D. he arrived did the meeting begin.
解析：考查倒装句，only + 状语放在句首，使用部分倒装，从句不倒装，主句倒装，句意：只有他到那的时候会议才开始。根据语境选D。
