单项选择题

A．It moves the same way as fish do.
B．It is propelled by tides and currents.
C．It swims with its string in all directions.
D．It copies the principle of jet propulsion.
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单项选择题
A．They find these stories interesting.B．They can learn how to write such stories.C．These stories are written by a famous doctor.D．The stories are on their reading list.
A．They find these stories interesting.
B．They can learn how to write such stories.
C．These stories are written by a famous doctor.
D．The stories are on their reading list.
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