31.张老师认为教育就是为了要让学生学习知识，把握学习内容。张老师遵循的理论是（ ）。

39.

26.

4. Race remains a prominent and ______ issue in the United States, which has struggled to overcome a legacy of slavery and discrimination.

27.

28.

9.Physicians need ________ expertise in pain and symptom management and skills in communication to meet the many needs of this population.

17. —Why do you choose to work with special needs children?   —I think it will add a new _____ to my life.

32.刘老师会在每次考试前提醒学生好好复习，根据桑代克的基本规律，这是（ ）的体现。

21.

12. A Russian plane broke up in the air, ________ all 224 people on board which was believed ________ by a bomb planted by Islamic State.

25.