国家开放大学 / 综合英语（3）
正确率：100%
The main reason why people fail to act when they stay together is that _ _ _ _ _ _ _ .
A. they are afraid of emergencies
B.they are reluctant to get themselves involved
C. others will act if they themselves hesitate
D.they do not have any direct responsibility for those who need help
A. they are afraid of emergencies
B.they are reluctant to get themselves involved
C. others will act if they themselves hesitate
D.they do not have any direct responsibility for those who need help
参考答案：
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