David didn't give up _______ he had failed in the experiment four times.[ ]A. if B. whileC. tho

题目简介

David didn't give up _______ he had failed in the experiment four times.[ ]A. if B. whileC. tho

题目详情

David didn't give up _______ he had failed in the experiment four times.
[     ]
A. if
B. while
C. though
D. since
题型:单选题难度:偏易来源:江苏中考真题

答案

C

更多内容推荐