单项选择题
In the animal kingdom the struggle for existence（）
A．is evidence of the inevitability of conflict among the fittest. B．arises from a need to live in groups. C．is evidence of the need to compete for scarce resources. D．arises from a natural desire to fight.
单项选择题 According to the author which of the following is inevitable（）
单项选择题 Etiquette as an art of gracious living is quoted as a feature of which country（）
单项选择题 According to the writer which of the following is part of chivalry A knight should（）
