赞题库-背景图
单项选择题

Questions 23 to 25 are based on the passage you have just heard.

A．When the species doesn"t match with its surroundings.
B．When the species is threatened by humans.
C．When the species shows a trend of decline.
D．When the species is added to the Federal list.
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热门试题

单项选择题A．It is a satisfactory law for most people in the US.B．It aims to protect endangered species and their habitat.C．It requires some local organizations to help animals.D．It is mainly about the protection of animals.

A．It is a satisfactory law for most people in the US.
B．It aims to protect endangered species and their habitat.
C．It requires some local organizations to help animals.
D．It is mainly about the protection of animals.

单项选择题A．Endangered native and foreign animals.B．All the endangered animal species.C．Native animals that are in danger.D．Rare animals living in the forest.

A．Endangered native and foreign animals.
B．All the endangered animal species.
C．Native animals that are in danger.
D．Rare animals living in the forest.