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.
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单项选择题
There are more women than men among the AIDS patients in the USA.
A．Y
B．N
C．NG
单项选择题
A．He has had thirteen decayed teeth.B．He doesn’’t have a single decayed tooth.C．He has fewer decayed teeth than other people of his age.D．He never had a single tooth pulled out before he was fifty.
A．He has had thirteen decayed teeth.
B．He doesn’’t have a single decayed tooth.
C．He has fewer decayed teeth than other people of his age.
D．He never had a single tooth pulled out before he was fifty.
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