Wang Lin failed to be admitted by Hong Kong University last year, and only then the importance of English.
A. he finally realized
B. he had realized
C. did he realize
D. had he realized
网友回答
A. he finally realized
B. he had realized
(答案→)C. did he realize
D. had he realized
解析：考查倒装句的用法：only+副词then或介词短语或状语从句，位于句首时，句子要用部分倒装，就是be动词，情态动词或助动词放在主语前。句意是：王林去年没被香港大学录取，只有那时他才意识到英语的重要性。选C。