问题
选择题
| Only when the meeting began _____ that he had left his papers at his office. |
A. will he realize B. he did realize C. did he realize D. should he realize |
答案
答案：C
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| Only when the meeting began _____ that he had left his papers at his office. |
A. will he realize B. he did realize C. did he realize D. should he realize |
答案：C