Althoughithadbeen

問題詳情：

 Although it had been _____ struggle for him to finish ______ experiment, he enjoyed the result with_______ satisfaction.

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

【回答】

B

知識點：冠詞

題型：選擇題