单项选择题

A．To avoid hostile Indians.
B．To avoid the strong sunlight.
C．To avoid the rain.
D．To avoid wild animals.
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单项选择题
A．From rocks in the mountain.B．From the remains of ancient sea life.C．From the soil under the sea.D．From ancient trees.
A．From rocks in the mountain.
B．From the remains of ancient sea life.
C．From the soil under the sea.
D．From ancient trees.
单项选择题
There are more women than men among the AIDS patients in the USA.
A．Y
B．N
C．NG
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