单项选择题

A．To escape from their enemies.
B．To catch more food.
C．To use their developing flippers.
D．To swim.
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单项选择题
A．She believes that the man drives carefully.B．She thinks that the man had signaled in time.C．She thinks that the man has mined her car.D．She doesn’t know what to do with the mess.
A．She believes that the man drives carefully.
B．She thinks that the man had signaled in time.
C．She thinks that the man has mined her car.
D．She doesn’t know what to do with the mess.
单项选择题
A．Waters off a level coast.B．The forest areas near the sea.C．The areas near the mouths of rivers.D．Both A and C.
A．Waters off a level coast.
B．The forest areas near the sea.
C．The areas near the mouths of rivers.
D．Both A and C.
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