Between the two generations, it is often not their age, their education that causes misunderstanding.
A. like
B. as
C. or
D. but
网友回答
A. like
B. as
C. or
(答案→)D. but
解析：not...but...意为“不是……而是……”。it is...that...构成强调句,对“their age,but their education”进行强调,表示“不是他们的年龄而是他们的教育引起误解”。like 意为“像……那样,和……一样”；as 意为“作为,当……的时候”；or 意为“或,或者,还是,抑或是”。