单项选择题

A．Scientists have studied them for centuries.
B．They were meat eating as well as plant eating.
C．They wandered the earth for millions of years.
D．They lived on land, in the sea, and in the sky.
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单项选择题
A．Alex doesn’t need a scholarship.B．Alex doesn’t have much money.C．Alex doesn’t know how to apply.D．Alex isn’t applying for a scholarship.
A．Alex doesn’t need a scholarship.
B．Alex doesn’t have much money.
C．Alex doesn’t know how to apply.
D．Alex isn’t applying for a scholarship.
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