单项选择题

A．ago
B．past
C．ahead
D．before
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单项选择题
What does the professor say about the age of the fossil
A．He has never seen a fossil that old.
B．It could be many millions of years old.
C．It is probably a recent specimen.
D．He will ask the lab how old it is.
单项选择题
A．elseB．nearC．extraD．similar
A．else
B．near
C．extra
D．similar
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