单选题 Both approaches require that the actor ______ his or her own personal values as well as the character's.
A. must understand B. should understand
C. has to understand D. need to understand

【正确答案】 B
【答案解析】本题测试虚拟语气的用法。表示要求、命令、建议等动词后接宾语从句中的谓语动词，应用should+动词原形表示虚拟语气，should可以省略。本题中require为动词，意为“要求”，故答案为B。