The generation makes it difficult for parents to understand their children's opinions.A.

问题补充：

The generation makes it difficult for parents to understand their childrens opinions.

A. division

B. gap

C. separation

D. interval

答案：

A. division

(答案→)B. gap

C. separation

D. interval

解析：generation gap 代沟。division分，划分；separation分开；interval间隔，间隙；（幕间或工间）休息。at intervals 不时，时时