___we tried hard,our efforts ended in failure.but we won't give up.a,unless.b,if only.c,although.d,because.

问题描述:

___we tried hard,our efforts ended in failure.but we won't give up.
a,unless.b,if only.c,although.d,because.

c

C,意思是尽管我们很努力的尝试了,但我们的努力以失败告终,但我们不会放弃

选C
尽管我们已经很努力了,但是我们的努力还是失败了.但是我们不会放弃.
其他选项意思均不符.