单项选择题

A．How to find the way to exam polluted sea fish.
B．Sea fish will be polluted when you eat it next time.
C．More and more sea fish will be polluted soon.
D．Sea fish will be free from oil pollution.
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单项选择题
A．She was a woman.B．She wrote too many letters.C．She couldn’t graduate from a medical school.D．She couldn’t establish her hospital.
A．She was a woman.
B．She wrote too many letters.
C．She couldn’t graduate from a medical school.
D．She couldn’t establish her hospital.
单项选择题
A．To escape from their enemies.B．To catch more food.C．To use their developing flippers.D．To swim.
A．To escape from their enemies.
B．To catch more food.
C．To use their developing flippers.
D．To swim.
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