单项选择题

A．To attract more sea animals to the testing site.
B．To drive dangerous sea animals away from the testing site.
C．To help track the sea animals being tested.
D．To determine how sea animals communicate with each other.
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单项选择题
A．She is not permitted to live off-campus this year.B．She has been living off-campus for a year.C．She is happy with her living arrangement.D．She is required to move next year.
A．She is not permitted to live off-campus this year.
B．She has been living off-campus for a year.
C．She is happy with her living arrangement.
D．She is required to move next year.
单项选择题
A．Because schoolchildren waste time and money on them.B．Because too many adults spend working hours playing them.C．Because they can easily be turned into a form of gambling.D．Because they are becoming a social problem, affecting both adults and children.
A．Because schoolchildren waste time and money on them.
B．Because too many adults spend working hours playing them.
C．Because they can easily be turned into a form of gambling.
D．Because they are becoming a social problem, affecting both adults and children.
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