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.
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单项选择题
A．Teach Don’s class while he’s absent.B．Give Professor Webster the key to Don’s office.C．Leave a message on the board in Don’s classroom.D．Bring Don the homework that was due today.
A．Teach Don’s class while he’s absent.
B．Give Professor Webster the key to Don’s office.
C．Leave a message on the board in Don’s classroom.
D．Bring Don the homework that was due today.
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.
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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