题目

 Misunderstandings _______ from lack of social communication, unless _______ properly, may lead to serious problems. A. arisen; handling                              B. arising; handled C. rising; handled                                      D. risen; handling 答案：解析：选B。第一空使用arising，现在分词短语作后置定语。arise(由……)引起；rise上升，升起。第二空使用handled则为状语从句的省略，省去了they are。

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