单项选择题

A．Their taming for circuses and zoos.
B．The destruction of their natural homes.
C．Man’s lack of knowledge about their behavior.
D．The greater vulnerability to extinction than other species.
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单项选择题
A．To impose restrictions on further immigration.B．To improve the working conditions of immigrants.C．To set a minimum wage level for new immigrants.D．To put requirements on languages for newcomers.
A．To impose restrictions on further immigration.
B．To improve the working conditions of immigrants.
C．To set a minimum wage level for new immigrants.
D．To put requirements on languages for newcomers.
单项选择题
A．From the captured or tamed elephants.B．From the British wildlife protection group.C．From elephant hunters in Thailand and Burma.D．From tourists visiting the Thai-Burmese border.
A．From the captured or tamed elephants.
B．From the British wildlife protection group.
C．From elephant hunters in Thailand and Burma.
D．From tourists visiting the Thai-Burmese border.
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