题目内容：
10.Since we have a focused subject， we should not talk _______.A.at once B.at hand C.at intervals D.at random
参考答案：
选择题：10.Since we have a focused subject， we should not
- 题目分类：武汉科技大学 大学英语（三）
- 题目类型：选择题
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A.at once B.at hand C.at intervals D.at random