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 trace the sea animals being testing site.
D．To determine how sea animals communicate with each other.
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单项选择题
A．Friends.B．Police and thief.C．Teacher and student.D．Tourist and guide.
A．Friends.
B．Police and thief.
C．Teacher and student.
D．Tourist and guide.
单项选择题
A．He didn’’t expect to buy a lot.B．He had only one bag of groceries.C．The supermarket is just down the block.D．He thought he’’d get a ride with the Kramers.
A．He didn’’t expect to buy a lot.
B．He had only one bag of groceries.
C．The supermarket is just down the block.
D．He thought he’’d get a ride with the Kramers.
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