HOC24
Lớp học
Môn học
Chủ đề / Chương
Bài học
2*6=12
3*7=21
4*8=32
5*9=45
The old man ______ to hospital early. I think they did it too late.
A. must have taken
B. should have taken
C. must have been taken
D. should have been taken