问题
选择题
| I have to see the doctor because I a lot these days. |
A. coughed B. am coughing C. have been coughing D. cough |
答案
答案：C
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| I have to see the doctor because I a lot these days. |
A. coughed B. am coughing C. have been coughing D. cough |
答案：C