单项选择题
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A.4.2 billion years ago.
B.3.3 billion years ago.
C.2.9 billion years ago.
D.1.2 billion years ago.
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单项选择题
The Andean Indians live in the villages all over South America.
A.Y
B.N
C.NG
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单项选择题
A.Garbage from food.B.01d cars.C.Empty bottles.D.Bottle glass.
A.Garbage from food.
B.01d cars.
C.Empty bottles.
D.Bottle glass.
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