单项选择题

A．Call on people to protect sharks.
B．Point out the living environment of sharks.
C．Explain why the sharks are dangerous.
D．An introduction to sharks.
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单项选择题
A．To estimate the extreme weather.B．To develop the satellite technology.C．To improve agricultural output.D．To learn how to change information to maps more efficiently.
A．To estimate the extreme weather.
B．To develop the satellite technology.
C．To improve agricultural output.
D．To learn how to change information to maps more efficiently.
单项选择题
A．They hate each other.B．They cherish each other.C．The boy care about the girl very much.D．The boy jokes the girl.
A．They hate each other.
B．They cherish each other.
C．The boy care about the girl very much.
D．The boy jokes the girl.
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