When a territorial animal or bird ____(闯入) on the territory of another creature of the same species, the latter will only perform some hostile gestures to warn off the intruder.
查看答案
The encouragement of competition in all possible fields should tend to diminish the ____(可能性) of war rather than increase it.
A small firm that once worked as a team to produce high-quality goods is likely to be absorbed into a vast organization where their work is ____(机械的) and there is no possibility for personal expression.
A tiger that once came out of the jungle into a village and attacked a man was later found to have an injured ____(爪子) that had evidently prevented it from hunting its usual prey.
In ____(史前的) times a group of about 60 people had many kilometres of empty land to wander and search for food in.