单项选择题

A．The salinity of the ocean.
B．Pollutants found at sea.
C．The composition of coral reefs.
D．The weather patterns of coastal areas.
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单项选择题
A．He’s a reporter,B．He’s a salesman.C．He’s a repairman.D．He’s a mailman.
A．He’s a reporter,
B．He’s a salesman.
C．He’s a repairman.
D．He’s a mailman.
单项选择题
A．At the information desk.B．On the platform.C．On the train.D．Near the stairs.
A．At the information desk.
B．On the platform.
C．On the train.
D．Near the stairs.
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