单项选择题
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A.Gathering non-relevant materials.
B.Stealing another person’s ideas.
C.Sharing notes with someone else.
D.Handing in assignments late.
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单项选择题
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.
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.
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