I have to see the doctor this afternoon because I a lot lately.A. have been coughingB. ha

问题补充：

I have to see the doctor this afternoon because I a lot lately.

A. have been coughing

B. had coughed

C. coughed

D. cough

答案：

(答案→)A. have been coughing

B. had coughed

C. coughed

D. cough

解析：考查动词时态。句意：今天下午我必须得去看医生因为我近期总是咳嗽。把握关键词：recently，近期，用于现在完成时，排除B C 和D ， A. have been coughing现在完成进行时，强调动作持续不间断，说明咳嗽的严重，所以A正确。