单项选择题

A．Sea resources decline more rapidly than other resources.
B．Fishing is important to industry.
C．Fish are an important food source.
D．Fish are more threatened than other animals.
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单项选择题
A．Helping a friend find the right department.B．Buying himself some shoes.C．Taking a class at the gymnasium.D．Returning a jogging suit he bought.
A．Helping a friend find the right department.
B．Buying himself some shoes.
C．Taking a class at the gymnasium.
D．Returning a jogging suit he bought.
单项选择题
A．Animal skins.B．Suitable strands.C．All vines.D．All stems of plants.
A．Animal skins.
B．Suitable strands.
C．All vines.
D．All stems of plants.
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