题目内容：
Please call me back when you are free.
参考答案：【答案仅供学习，请勿对照自行用药等】
答案解析：
选择题：Please call me back when you are free.
- 题目分类： 大学英语B级
- 题目类型：选择题
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129英译中The doctor is very patient with his patients.