large roomsshows the different ______ of genders.

　　38、 High densitymay reduce helping behaviour due to the ______.

　　39、 People feelless crowding if they can ______ more over the situation.

　　40、 The mosteffective way to reduce the effect of high density on human beings is ______.

　　参考答案：

　　V

　　I

　　III

　　VII

　　IX

　　II

　　IV

　　resourcelimitations

　　socialdensity

　　privacy

　　personalspace requirements

　　diffusionof responsibility

　　control

　　socialwithdrawal

　　答案仅供参考

　　Passage 2：

　　题材：动物

　　题型：选择+填空

　　题号：旧题

　　参考文章：

　　Ants could Teach Ants

　　The ants are tiny and usually nest betweenrocks in the south coast of England. Transformed into research subjects at theUniversity of Bristol, they raced along a tabletop foraging for food -- andthen, remarkably, returned to guide others. Time and again, followers trailed