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Wang Lin failed to be admitted by Hong Kong University last year, and only then _______ the importance of English.

Wang Lin failed to be admitted by Hong Kong University last year, and only then _______ the importance of English.

Wang Lin failed to be admitted by Hong Kong University last year, and only then _____________the importance of English.

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

   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

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. had he realized  D. did he realize

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．had he realized                                  D．did he realize

 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. had he realized                                  D. did he realize

Wang Lin failed to be admitted by Hong Kong University last year, and only then _____________the importance of English.

Wang Lin failed to be admitted by Hong Kong University last year，and only then________the importance of English.