问题
选择题
| — What about going for a picnic with us? — I'm sorry I can't. My mother isn't ______. I have to cook. |
A. out B. in C. at D. for |
答案
答案：B
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| — What about going for a picnic with us? — I'm sorry I can't. My mother isn't ______. I have to cook. |
A. out B. in C. at D. for |
答案：B