单项选择题

Since 1992, cancer death rates among black Americans

A．have been going up and down.
B．have remained stable.
C．have increased,
D．have fallen.
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单项选择题
Cancer is more treatable if it is detected
A．in an early stage.
B．in a late stage.
C．all of a sudden.
D．together with other diseases.
单项选择题
Black Americans are more likely to die of cancer than
A．people in other countries.
B．white Americans.
C．all other Americans.
D．their ancestors.
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