【题目】I have to see the doctor because I ________ a lot lately.
A. have been coughing B. had coughed
C. coughed D. cough
在线课程【答案】A
【解析】试题分析：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。