We won’t give up we should fail ten times.A. even ifB. sinceC. whetherD. until

问题补充：

We won’t give up we should fail ten times.

A. even if

B. since

C. whether

D. until

答案：

(答案→)A. even if

B. since

C. whether

D. until

解析：主要测试连词。从句子语境可知：主句和从句为让步关系。只能选even if‘即使’。