Microsoft ended support for Windows XP after April 8, which a major operating system for some Chinese puter users, and advised users to upgrade to Windows 8.1.
A. remained
B. remains
C. is remaining
D. is remained
网友回答
A. remained
(答案→)B. remains
C. is remaining
D. is remained
解析：句意：微软在4月8日结束支持Windows XP,这对一些中国电脑用户仍然是一个主要的操作系统,并建议用户升级到Windows 8.1。remain表示”仍然是”是连系动词，不能用被动，因为Windows XP现在对一些中国电脑用户仍然是一个主要的操作系统，所以用一般现在时，选B。