You may not understand what they have done, because they a younger generation.
A. belong to
B. are belonged to
C. are belonging to
D. will be belonged to
网友回答
(答案→)A. belong to
B. are belonged to
C. are belonging to
D. will be belonged to
解析：考查动词用法。短语belong to属于，为进行时，无被动语态。故选A。句意：你也许不理解他们所做的，因为他们属于年轻一代。