题目内容：
Nobody can be good at computer programming ____he has a good command of English.A) if B) unless C) only D) once
参考答案：
选择题：Nobody can be good at computer programming ____he
- 题目分类：石家庄铁道大学大学英语
- 题目类型：选择题
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A) if B) unless C) only D) once