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 ______ he met with the difficulty did he realize the importance of our help.

   A. Even though      B. Never until       C. Only before       D. Ever since

  ______ he met with the difficulty did he realize the importance of our help.

   A. Even though      B. Never until       C. Only before       D. Ever since

  ______ he met with the difficulty did he realize the importance of our help.

   A. Even though      B. Never until       C. Only before       D. Ever since

 ______ he met with the difficulty did he realize the importance of our help.

  A. Even after        B. Never until    C. Only before     D. Ever though