◎ 题干
I have to see the doctor because I _____ a lot lately.

A. have been coughing
B. had coughed
C. coughed
D. cough
◎ 答案
查看答案
◎ 解析
查看解析
◎ 知识点
    根据魔方格专家分析,试题“I have to see the doctor because I _____a lot lately. [ ]A. have been coughing B. had coughed C. coughedD. cough …”主要考查了你对  【现在完成进行时】  等知识点的理解和应用能力。关于这些知识点的“档案”,你可以点击相应的链接进行查看和学习。