问题
选择题
John was fired by his factory and only then ________ how wrong he was to be lazy and careless.[ ]
A. had he realized
B. he had realized
C. did he realize
D. he realized
答案
答案：C
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John was fired by his factory and only then ________ how wrong he was to be lazy and careless.[ ]
A. had he realized
B. he had realized
C. did he realize
D. he realized
答案：C