单项选择题

A．When descending from a higher position.
B．When tailing to go after its food.
C．When propelling itself towards its food.
D．When being taken by tides and currents.
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单项选择题
A．300 years.B．50 years.C．200 years.D．100 years.
A．300 years.
B．50 years.
C．200 years.
D．100 years.
单项选择题
A．He’’s playing sports.B．He’’s watching sports games.C．He’’s driving.D．He’’s fighting.
A．He’’s playing sports.
B．He’’s watching sports games.
C．He’’s driving.
D．He’’s fighting.
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