Nowadays, cellphones have features such as games ,music and calendars and more new functions .
A. are added
B. have added
C. are being added
D. have been added
网友回答
A. are added
B. have added
(答案→)C. are being added
D. have been added
解析：考查时态和语态：句意：现在最新的手机有很多功能，游戏、 音乐和会提醒你忘了约会和重要日期的电子日历等功能正被加入。因为时间是nowadays，而且是被动关系，用现在进行时的被动语态，选C。