Developed in the early 1900s in Canada, synchronized swimming is a sport is performed almost exclusively by women, altho?
Developed in the early 1900s in Canada, synchronized swimming is a sport is performed almost exclusively by women, although there is some participation by men
A. Developed
B. is performed
C. although
D. is
Đáp án B
Is performed –> performedMệnh đề quan hệ rút gọn “which is”