问题
选择题
| Sit down, Emma. You will only make yourself more tired, _____ on your feet. |
A. to keep B. keeping C. having kept D. to have kept |
答案
答案：B
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| Sit down, Emma. You will only make yourself more tired, _____ on your feet. |
A. to keep B. keeping C. having kept D. to have kept |
答案：B