单项选择题

A．They are more popular.
B．Their number is reducing dramatically.
C．They are losing participants.
D．They are doing more harm to people.
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单项选择题
A．She works in a law office.B．She works for an answering service.C．She works at an employment agency.D．She is a teacher.
A．She works in a law office.
B．She works for an answering service.
C．She works at an employment agency.
D．She is a teacher.
填空题
collision
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