题目
The scientists will succeed in their experiment they give up.
A. unless B. if C. after D. until
知识点：主从复合句章节：句法 / 复合句
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The scientists will succeed in their experiment they give up.
A. unless B. if C. after D. until
答案与解析
自由组卷
围绕这道题再组一份练习 →
完整试卷
浏览同年级试卷结构 →