问题
选择题
24. 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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24. 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