Nowadays, either 21st Century or other English newspapers increasingly popular among us students.
A. are
B. is
C. were
D. was
网友回答
(答案→)A. are
B. is
C. were
D. was
解析：句意：现在要么21世纪要么其他英文报纸越来越受学生的欢迎。主语是either…or…连接的时候，谓语用就近原则，这里和other English newspapers一致，用复数，因为时间是nowadays，所以和一般现在时连用，所以选A。