单项选择题

A．Sewage and industrial waste.
B．Oil pollution on the beach.
C．Oil discharged at sea when people cleaning oil tanks.
D．The oil that leaks out after ship collisions.
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单项选择题
A．How to interpret what people say.B．What to do when you listen to others talking.C．How to avoid mistakes when you communicate with people.D．Why we go wrong with people sometimes.
A．How to interpret what people say.
B．What to do when you listen to others talking.
C．How to avoid mistakes when you communicate with people.
D．Why we go wrong with people sometimes.
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