Themedicalreforminthatcountryprovedtobe

問題詳情：

 The medical reform in that country proved to be _____ failure, but as we know, success often comes after _____ failure.

A. a; the                B. a; /                       C. a; a               D. /; /

【回答】

B

知識點：冠詞

題型：選擇題