53 điểm
NgọcAnh
nguyenngoc
08:07:45 18-Jul-2021
South African anti-apartheid veteran Winnie Madikizela-Mandela, ex-wife of late President Nelson Mandela,____in and out of hospital since 2016 for back and knee surgery. A. has been being B. has been C. was D. had been
Hãy giúp mọi người biết câu trả lời này thế nào?