题目内容：
According to the author, we cannot sleep well when we ______.A. are worrying about our safety
B. are overworked
C. are in a tent
D. are away from home
参考答案：
选择题：According to the author, we cannot sleep well when
- 题目分类：乐山师范学院综合英语
- 题目类型：选择题
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A. are worrying about our safety
B. are overworked
C. are in a tent
D. are away from home