1110 điểm
Hoàng Thảo
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
Ngọc Hân
02:06:33 21-Jun-2023
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