The musician ________ the guitar for about an hour...

Câu hỏi: The musician ________ the guitar for about an hour.      

A has been playing

B is playing    

C was playing    

D will be playing

Câu hỏi trên thuộc đề trắc nghiệm

Đề thi thử THPTQG môn Anh 2016 Hồng Quang lần 2